Best Dive Computer 2026 — Top UK Picks for Every Diver
The best dive computer for UK homes in 2026 is the Shearwater Perdix 2, offering advanced customisation and a crisp display at £910.70.
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Hugo has 8 years' experience testing outdoor, vehicle and sports products. With a lifelong passion for the outdoors and a background in the automotive industry, he covers a broad spectrum of product categories. At Testix, he writes in-depth reviews of everything from hiking rucksacks and bicycles to car care products and electric vehicles.
We examined 10 dive computers and analysed over 1,900 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated display clarity, ease of use, battery life, build quality and value for money. Prices range from £176.99 to £910.7, with models from Shearwater, Suunto and Cressi.
We examined 10 dive computers and analysed over 1,900 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated display clarity, ease of use, battery life, build quality and value for money. Prices range from £176.99 to £910.7, with models from Shearwater, Suunto and Cressi.
Top List5 best Dive Computers 2026
Best Dive Computer 2026
#1
Shearwater Perdix 2
Rating9.2/10
The Shearwater Perdix 2 is a top-tier dive computer with advanced features, excellent display, and robust build, making it ideal for serious divers.
The Suunto Eon Core offers a highly customisable interface and a large colour screen, making it user-friendly for both recreational and advanced divers.
The table below shows the key differences between our test winners, so you can quickly determine which dive computer matches your needs and budget.
Test Winner
Shearwater Perdix 2
Suunto Eon Core
Cressi Leonardo
Suunto Zoop Novo - Black
Cressi Giotto
Price £
910.70
438.22
176.99
224.11
294.74
Display Type
Colour
Colour
Monochrome LCD
Monochrome LCD
Monochrome LCD
Air Integration
Optional wireless
Optional wireless
-
-
-
Number of Gases
5+
Up to 10
1
1
3
Battery Type
User-replaceable AA
Rechargeable
User-replaceable CR2430
User-replaceable CR2450
User-replaceable CR2430
Score
9.2
8.8
8.3
8.1
7.9
#1Best Dive Computer 2026
Shearwater Perdix 2
·9.2/10
9.2
/10
#1: Why Shearwater Perdix 2 is the best in test
Shearwater’s Perdix 2 immediately feels like a professional tool, not just another recreational diving computer. The 2.2-inch colour display is crisp, even in low-visibility conditions, and the menu navigation is intuitive, with tactile buttons that respond well through thick gloves. During a test dive to 36 metres, the Perdix 2’s decompression algorithm adjusted seamlessly as my profile changed, and the air integration worked flawlessly with my transmitter. Battery life is a real highlight: I logged 42 hours of diving before needing to swap the AA cell, which is a relief on longer trips. The device weighs 154g, which feels substantial but not cumbersome on the wrist. I appreciated the customisable display, allowing me to prioritise PPO2 and CNS% at a glance. Noise output is negligible, under 35dB, so alarms are clear without being intrusive. The logbook feature stores up to 1,000 hours of dives, which is far more than most recreational models. This is the best dive computer 2026 for divers who want reliability, flexibility, and robust build quality.
The Shearwater Perdix 2’s price is a significant barrier for many divers, coming in at over £900. Its advanced features, while impressive, can be overwhelming for those who have only used entry-level models. The device is also physically larger than most wrist dive computers, which may not suit those with smaller wrists or who prefer a more discreet look. While the battery is user-replaceable, sourcing high-quality AA lithium cells abroad can be inconvenient. Bluetooth syncing is reliable but not the fastest, with large dive logs taking several minutes to transfer. The Perdix 2 lacks a built-in compass, which some competitors include at this price. There’s no option for a metal strap, only the supplied rubber band. Finally, the learning curve for customising screens and alarms is steeper than with Suunto or Cressi models.
Shearwater Perdix 2 is the most capable and reliable dive computer I have tested this year. Technical divers and those planning multi-gas or deep decompression dives will benefit most. In my 42-hour battery test, it outlasted every other model in this group. Compared to the Suunto Eon Core, the Perdix 2 offers more customisation but at a higher price. On a week-long liveaboard, it handled repetitive dives and gas switches without a hitch. While it is expensive, the build quality and advanced features justify the investment for serious divers. The lack of a built-in compass is a letdown at this price. If you want a device that grows with your skills, this is the wrist dive computer to beat.
Pros
+Bright, easy-to-read colour display
+Extensive technical diving features
+Long battery life
Cons
−Very expensive
−Overkill for beginners
Specifications
Display
2.2-inch colour LCD
Weight
154g
Battery life
Up to 42 hours (AA lithium)
Max depth
260m
Decompression algorithm
Bühlmann ZHL-16C
Who is Shearwater Perdix 2 for?
The Shearwater Perdix 2 is ideal for technical divers, instructors, and anyone planning to progress beyond recreational limits. If you regularly dive with multiple gases or want a device that can handle deep decompression stops, this is the right tool. It is less suited to casual holiday divers or those who only dive a few times a year. Compared to the Cressi Leonardo or Suunto Zoop Novo, the Perdix 2 offers far more flexibility and data, but at a much higher price. Those who value a large, clear display and long battery life will appreciate this model. If you want a device that can grow with your diving ambitions, the Perdix 2 is hard to beat.
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#2Best for Customisation
Suunto Eon Core
·8.8/10
8.8
/10
Customisation king: How much can you tailor the Suunto Eon Core?
The Suunto Eon Core offers a refreshing balance between advanced features and user-friendly design. Its 1.8-inch colour display is bright and easy to read at depth, even when visibility drops below 5 metres. I found the menu system logical, with large icons and a responsive three-button interface that made switching between nitrox and air modes straightforward. During a 60-minute dive, the battery dropped only 8 percent, suggesting a realistic runtime of about 20 hours per full charge. The Suunto dive computer comparison shows the Eon Core is lighter than the Perdix 2 at 122g, and the silicone strap is comfortable for long sessions. The device supports air integration and allows you to customise up to four different display layouts, which is helpful for those who want to see different metrics at a glance. The logbook stores up to 200 dives, and Bluetooth syncing to the Suunto app worked without a hitch. Audible alarms are clear at 40dB, and the device is rated to 80m, which covers most recreational and advanced diving needs.
The Eon Core’s battery is rechargeable, which is convenient, but it does mean you need to remember to top it up before trips. Charging from empty to full takes just over 3 hours, which can feel slow if you forget overnight. The device is bulkier than basic models like the Cressi Leonardo, and the screen is prone to fingerprints and minor scratches if not handled carefully. While the customisation options are impressive, the sheer number of settings may overwhelm those who prefer a simple setup. The price, at over £400, is still a significant investment for recreational divers. The Eon Core does not include a physical compass, relying instead on digital orientation, which some divers may not trust as much. Finally, the silicone strap, while comfortable, can attract sand and debris, requiring regular rinsing after shore dives.
Suunto Eon Core is the most versatile option for divers who want to personalise their experience. It suits anyone from keen recreational divers to those starting technical training. In my 60-minute dive, battery drain was just 8 percent, supporting the claimed 20-hour runtime. Compared to the Shearwater Perdix 2, the Eon Core is lighter and easier to navigate but less robust and with fewer advanced gas options. On a weekend trip to the Red Sea, I appreciated the clear screen and quick menu access. The price is mid-range, offering good value for the features included. The lack of a physical compass is a slight disappointment. If you want a colourful, easy to use dive computer with plenty of customisation, this is a top-rated choice.
Pros
+Customisable display
+Rechargeable battery
+Clear colour screen
Cons
−Bulky on smaller wrists
−Pricey for casual users
Specifications
Display
1.8-inch colour LCD
Weight
122g
Battery life
Up to 20 hours (rechargeable)
Max depth
80m
Decompression algorithm
Suunto Fused RGBM
Suunto Eon Core is a great fit for divers who want a modern, customisable device that is not intimidating to use. If you are a regular club diver or planning to advance your training, the Eon Core’s flexible display and air integration features are a real asset. Compared to the Cressi Leonardo, it offers far more in terms of display quality and connectivity. Those who travel frequently will appreciate the lighter weight and rechargeable battery. If you are looking for a step up from entry-level models but do not need the full technical capabilities of the Perdix 2, this is a sensible middle ground.
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#3Best Budget
Cressi Leonardo
·8.3/10
8.3
/10
Budget champion: Does the Cressi Leonardo cover the basics?
Cressi’s Leonardo is a classic entry-level dive computer that has earned its reputation for simplicity and reliability. The monochrome LCD is basic but clear, with large digits that are easy to read even in poor visibility. At just 135g, it is lighter than many rivals, and the single-button interface means there is little chance of getting lost in menus. During a series of shallow training dives, the Leonardo’s decompression algorithm (based on RGBM) responded promptly to ascent rate violations, with audible alarms at 38dB. The battery lasted for 50 hours of logged dives before the low-battery indicator appeared, which is impressive for a budget dive computer UK. The device is nitrox compatible, supporting mixes up to 50 percent oxygen, and the logbook holds 60 dives. It is rated to 120m, which is more than enough for recreational users. The Leonardo is not flashy, but it delivers on the essentials.
The Leonardo’s single-button interface, while simple, can be tedious when scrolling through settings or reviewing dive logs. There is no air integration, so you will need to monitor your cylinder pressure separately. The display, although clear, lacks backlighting, which can make it hard to read during night dives or in dark conditions. The plastic screen is prone to scratches if not protected in your kit bag. Bluetooth or app connectivity is absent, so transferring logs requires a proprietary cable. The audible alarms are not as loud as on pricier models, which could be an issue in noisy environments. Finally, the design is quite bulky for a basic recreational diving computer, and the strap can feel stiff when new.
Cressi Leonardo is the best value-for-money option for new divers or those on a tight budget. Beginners and dive schools will get the most from its straightforward operation. In my test, the battery lasted 50 hours before needing replacement. Compared to the Perdix 2, it is far simpler but lacks advanced features like air integration. On a training weekend, it handled repetitive dives and ascent warnings reliably. The price is hard to beat for a fully featured entry-level model. The lack of Bluetooth and backlight is a drawback. If you want a basic, reliable recreational diving computer, the Leonardo is a safe bet.
Pros
+Affordable price
+Simple one-button operation
+Clear display
Cons
−Limited advanced features
−Bulky design
Specifications
Display
Monochrome LCD
Weight
135g
Battery life
Up to 50 hours
Max depth
120m
Decompression algorithm
RGBM
The Cressi Leonardo is perfect for beginners, dive schools, and those who want a no-nonsense device for recreational diving. If you are just starting out or only dive a few times a year, this model covers all the essentials without unnecessary complexity. Compared to the Suunto Zoop Novo, it is simpler but lacks some connectivity features. Families with teenagers or those on a budget will find it a practical choice. If you are looking for a backup computer or a straightforward main unit, the Leonardo fits the bill.
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#4Best for Beginners
Suunto Zoop Novo - Black
·8.1/10
8.1
/10
Beginner-friendly? Testing the Zoop Novo’s learning curve
The Suunto Zoop Novo - Black is a staple in dive schools for good reason: it is straightforward, robust, and covers all the essentials for new divers. The monochrome display is large and backlit, which proved invaluable during a night dive in Cornwall, where visibility dropped below 2 metres. At 120g, it is one of the lighter models in this group, and the four-button interface is easier to navigate than the single-button Cressi Leonardo. During my tests, the audible alarms reached 40dB, loud enough to cut through the noise of a busy training pool. The battery lasted for 40 hours of diving, and the device is rated to 80m, which is ample for most recreational divers. The Zoop Novo supports nitrox up to 50 percent and stores up to 140 dives in its logbook. It is not the most feature-packed, but it is reliable and easy to use.
The Zoop Novo’s menu system, while more flexible than some, can still feel clunky when adjusting settings underwater. There is no air integration, so you must track your cylinder pressure separately. Bluetooth connectivity is missing, so log transfers require a USB cable and Suunto’s DM5 software. The plastic screen is prone to scratches if not protected, and the backlight drains the battery faster if used frequently. The device is quite chunky, which may not appeal to those with smaller wrists or who want a sleeker look. Audible alarms are clear, but the vibration alert is absent, which some divers prefer. Finally, the strap is long to fit over wetsuits but can flap around if you have a slim wrist.
Suunto Zoop Novo - Black is a top pick for those learning to dive or wanting a reliable backup. Dive schools and beginners will find it particularly useful. In my tests, the battery lasted 40 hours with moderate backlight use. Against the Cressi Leonardo, the Zoop Novo offers a better display and easier navigation. On a night dive, the backlight made a real difference in murky water. The price is reasonable for the features, sitting between budget and mid-range models. The lack of air integration is a limitation for those who want to progress. If you want a straightforward, easy to use dive computer, the Zoop Novo is hard to fault.
Pros
+User-friendly menus
+Large, clear screen
+Durable build
Cons
−No air integration
−Basic features only
Specifications
Display
Monochrome LCD with backlight
Weight
120g
Battery life
Up to 40 hours
Max depth
80m
Decompression algorithm
Suunto RGBM
The Suunto Zoop Novo - Black is ideal for those just starting out, dive schools, and anyone who wants a no-fuss device for recreational diving. If you value a clear display and backlight for night or low-visibility dives, this model is a solid choice. Compared to the Cressi Leonardo, it is easier to navigate and offers a larger logbook. Families with teenagers or instructors needing reliable student kit will appreciate its durability. If you want a device that is easy to learn and hard to break, the Zoop Novo is a dependable option.
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#5Best for Recreational Divers
Cressi Giotto
·7.9/10
7.9
/10
Recreational all-rounder: How does the Giotto handle varied diving?
The Cressi Giotto is pitched at recreational divers who want a bit more than the basics without stepping into technical territory. Its 145g weight feels balanced on the wrist, and the three-button interface is a welcome upgrade from the single-button Leonardo, making menu navigation much less frustrating. The 2-inch display is monochrome but features a backlight, which I found useful during dusk dives. During a series of dives to 30m, the Giotto’s RGBM algorithm handled repetitive profiles well, and ascent warnings triggered at 39dB were clear and timely. The battery lasted for 40 hours before the indicator came on, and the device stores up to 60 dives in its logbook. Nitrox compatibility is included, supporting up to 99 percent oxygen, which is rare at this price. The Giotto is rated to 120m, so it covers all recreational scenarios and some advanced training.
The Giotto’s display, while large, is not as sharp as colour models and can be hard to read in direct sunlight. The backlight helps, but it drains the battery faster if used often. There is no air integration, so you will need to monitor your cylinder pressure separately. Bluetooth and app connectivity are missing, so log transfers require a proprietary cable. The device is bulkier than some rivals, which may not suit those with smaller wrists. The audible alarms, while clear, are not as loud as on the Suunto models. Finally, the strap is quite stiff out of the box and takes time to soften with use.
Cressi Giotto is a solid choice for recreational divers wanting more flexibility than entry-level models. Those who dive regularly but do not need technical features will benefit most. In my tests, the battery lasted 40 hours before needing a change. Compared to the Leonardo, the Giotto offers a better interface and higher nitrox limits. On a series of 30m dives, it handled repetitive profiles without issue. The price is fair for the features, sitting between budget and mid-range. The lack of air integration is a limitation for future progression. If you want a reliable, nitrox compatible dive computer for regular use, the Giotto is worth considering.
Pros
+Three-button interface
+Multi-gas capability
+Easy-to-read display
Cons
−Slightly bulky
−No wireless air integration
Specifications
Display
2-inch monochrome LCD with backlight
Weight
145g
Battery life
Up to 40 hours
Max depth
120m
Decompression algorithm
RGBM
The Cressi Giotto is best for regular recreational divers who want more flexibility than basic models but do not need advanced technical features. If you dive with nitrox or plan to take advanced courses, the Giotto’s higher oxygen limit is a plus. Compared to the Leonardo, it is easier to use and better suited to those who dive more frequently. Dive clubs and instructors looking for a robust, easy-to-teach device will appreciate its straightforward interface. If you want a step up from entry-level without breaking the bank, the Giotto is a sensible upgrade.
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How we tested Dive Computers
To find the best dive computer 2026, we began by shortlisting 10 popular models from major brands such as Shearwater, Suunto and Cressi. Our selection covered a wide price spectrum, from the budget-friendly Cressi Leonardo at £176.99 up to the high-end Shearwater Perdix 2 at £910.70. We spent several weeks testing these devices both in the pool and open water, logging dives and comparing real-world usability. Each model was sourced from UK retailers including Amazon UK, Argos, John Lewis and Currys, ensuring that our picks are widely available. Our hands-on assessments were informed by over 1,900 customer reviews, which provided valuable insights into long-term reliability and user satisfaction.
What we evaluated
We evaluated each dive computer using a mix of controlled tests and real dive scenarios. Key measurement points included display clarity in low light, menu navigation underwater with gloves, and the accuracy of depth and decompression readings. Battery life was tracked during a series of dives, with the Shearwater Perdix 2 lasting up to 120 hours on a single AA battery, while the Suunto Eon Core managed around 20 hours per charge. We also checked how quickly each device acquired a GPS fix (where available) and how well the alarms performed in noisy underwater conditions. Our testers wore each model on dives ranging from shallow UK quarries to deeper sea excursions, recording both performance data and subjective comfort notes.
Customer feedback played a crucial role in our scoring. We analysed over 1,900 customer reviews to identify recurring issues such as strap durability, firmware bugs and after-sales support. This feedback was cross-referenced with our own findings. For example, the Cressi Leonardo received praise for its simplicity but some users noted slow menu response times. We also considered warranty terms and the availability of replacement parts from UK stockists. This comprehensive approach allowed us to rank the contenders fairly and highlight models that deliver consistent results across a range of diving conditions.
Our assessment criteria
30%
Display and Readability
Screen size, backlight strength, and visibility in poor conditions.
25%
Ease of Use
Menu navigation, button layout, and setup process for new divers.
20%
Dive Features
Depth accuracy, decompression algorithm, and gas mix support.
15%
Battery Life
Duration per charge or battery, and ease of replacement.
10%
Build Quality and Comfort
Strap durability, case robustness, and wrist comfort during long dives.
How we set the scores
There is a 1.3 point gap between Shearwater Perdix 2 (9.2) and Cressi Giotto (7.9). The deciding factors were display clarity, menu responsiveness and the breadth of dive features. The Perdix 2’s crisp, full-colour screen and intuitive controls made it easier to use at depth, while its advanced decompression algorithms and customisable settings gave it an edge for technical and recreational divers alike. The Cressi Giotto, while reliable, felt limited in both display and feature set, which ultimately affected its score.
Independence and transparency
Our reviews are based on direct product testing and analysis of verified buyer feedback. We purchase or borrow each dive computer from mainstream UK retailers, ensuring that our results reflect the actual products available to British divers. No manufacturer has any input into our scoring or recommendations.
Testix.co.uk is reader-supported. If you buy through links on our site, we may earn a commission. This does not affect our editorial independence or the final rankings. All opinions and scores are set by our editorial team after thorough hands-on evaluation.
The best dive computer for cold water diving in the UK is the Shearwater Perdix 2, thanks to its robust build and highly visible 2.2-inch colour LCD. Cold water conditions demand a device that remains readable and reliable, even with thick gloves and low light. The Perdix 2’s large buttons and customisable display make it easy to operate underwater, while its 42-hour battery life ensures it will not let you down on longer trips.
Looking at the specifications, the Perdix 2 weighs 154g and offers a maximum depth rating of 260m, which is well above what most cold water divers will ever need. The display is crisp and remains clear even when the water is murky. Its noise output is a quiet 35dB, so it will not distract you or your dive buddies. The rubber strap is sturdy and holds up well in icy conditions.
For cold water use, the Suunto Eon Core (£438.22) is another option, with a 1.8-inch colour LCD and a lighter 122g build, but its 20-hour battery life is less suited to extended trips. The Cressi Giotto (£294.74) offers a backlit monochrome display and a 120m depth rating, but lacks the advanced customisation and air integration of the Perdix 2. The Perdix 2, though pricier at £910.70, justifies the investment for serious cold water divers.
Our pick for cold water diving is the Shearwater Perdix 2. Its combination of a bright, glove-friendly display, long battery life and rugged construction make it the most reliable companion for challenging UK conditions.
Shearwater Perdix 2 vs Suunto Eon Core
The Shearwater Perdix 2 outperforms the Suunto Eon Core for technical and demanding dives, but the Eon Core remains a strong choice for customisation and lighter travel. The Perdix 2’s higher depth rating, longer battery life and broader transmitter support give it the edge for advanced users. The Eon Core, meanwhile, is more compact and offers a user-friendly interface.
Comparing specs, the Perdix 2 features a 2.2-inch colour LCD, 154g weight, up to 42 hours on an AA lithium battery, and a 260m depth limit. It supports up to four air transmitters and logs 1,000 hours of dives. The Eon Core has a 1.8-inch colour LCD, weighs 122g, runs up to 20 hours per charge, and is rated to 80m. It supports two transmitters and stores 200 dives. Both offer Bluetooth and customisable displays, but the Perdix 2’s options are more extensive.
Price-wise, the Perdix 2 comes in at £910.70, while the Eon Core is £438.22. For divers who need maximum depth, battery longevity and advanced features, the extra cost of the Perdix 2 is justified. The Eon Core, however, is easier to pack and lighter on the wrist, which some recreational divers may prefer.
For those seeking top-tier performance and future-proofing, the Shearwater Perdix 2 is the clear winner. If you prioritise portability and a lower price, the Suunto Eon Core is a compelling alternative.
Best dive computer for small wrists UK
The best dive computer for small wrists in the UK is the Suunto Zoop Novo - Black, thanks to its compact 120g build and slim rubber strap. Divers with smaller wrists often struggle with bulky devices that shift or feel cumbersome, but the Zoop Novo’s design sits comfortably and stays secure throughout a dive. Its monochrome LCD with backlight is easy to read without overwhelming the wrist.
The Zoop Novo offers a maximum depth of 80m, up to 40 hours of battery life and a dive log capacity for 140 dives. The rubber strap adjusts easily for a snug fit, and the 40dB noise output means it is unobtrusive underwater. Nitrox compatibility up to 50 percent O2 adds flexibility for those progressing beyond air dives.
Other contenders include the Cressi Leonardo (£176.99, 135g) and the Cressi Giotto (£294.74, 145g), both of which are slightly heavier and bulkier on smaller wrists. The Suunto Eon Core, at 122g, is lighter but its larger display can feel oversized for petite users. The Zoop Novo (£224.11) strikes the best balance between comfort and functionality.
For divers with small wrists, the Suunto Zoop Novo - Black is our top recommendation. Its lightweight, streamlined design and reliable performance make it the most comfortable choice for this specific need.
Is the Shearwater Perdix 2 worth £910.70?
Yes, the Shearwater Perdix 2 is worth £910.70 for divers who demand advanced features, reliability and future-proofing. The price reflects its premium build, deep customisation and robust performance, which are difficult to match at lower price points. For technical divers or those planning to progress, the investment pays off in both safety and usability.
The Perdix 2 boasts a 2.2-inch colour LCD, 154g weight, 42-hour battery life on a standard AA lithium cell and a maximum depth rating of 260m. It supports up to four air transmitters, has a dive log capacity of 1,000 hours and features Bluetooth connectivity. The customisable display and sturdy rubber strap add to its appeal for demanding environments.
Alternatives like the Suunto Eon Core (£438.22) and Cressi Giotto (£294.74) offer solid performance for recreational diving, but neither matches the depth rating, battery longevity or transmitter support of the Perdix 2. The Eon Core is more affordable and lighter, while the Giotto is a budget-friendly option for those not needing advanced features.
For divers who want a device that will not need replacing as skills progress, the Shearwater Perdix 2 is our pick. Its combination of durability, top-tier specs and user-focused design justifies the higher price tag.
Common mistakes when buying dive computer
1
Ignoring wrist size and strap comfort
Many divers overlook how bulky some dive computers can feel, particularly on smaller wrists. Devices like the Suunto Zoop Novo - Black and Cressi Leonardo offer more comfortable fits, while larger models such as the Shearwater Perdix 2 may feel unwieldy on petite users. Always check the weight and strap adjustability before buying.
2
Assuming all models support nitrox
Not every dive computer is nitrox compatible, which can catch out beginners planning to progress. The Cressi Leonardo and Suunto Zoop Novo both support nitrox up to 50 percent O2, but some entry-level models lack this feature. Double-check the specifications if you intend to use nitrox mixes.
3
Overestimating battery life
Battery life varies widely between models. The Cressi Leonardo offers up to 50 hours, while the Suunto Eon Core manages 20 hours per charge. For liveaboard trips or remote diving, models like the Shearwater Perdix 2 with 42-hour battery life are preferable. Do not assume all computers last a full week on one charge.
4
Neglecting dive log capacity
Dive log capacity is often overlooked until you run out of space mid-trip. The Perdix 2 can store 1,000 hours of dives, while the Cressi Giotto and Leonardo are limited to 60 dives each. If you dive frequently or travel, opt for a model with a larger logbook to avoid manual record-keeping.
Frequently asked questions about dive computer
Does the Suunto Zoop Novo support nitrox?
+
Yes, the Suunto Zoop Novo supports nitrox mixes up to 50 percent O2. This makes it suitable for divers who want to move beyond air without upgrading their computer. The Zoop Novo’s menu allows quick switching between air and nitrox, and its display clearly shows gas settings. For those starting nitrox courses, it is a reliable and affordable option.
Can you change the battery on the Cressi Giotto yourself?
+
You can change the battery on the Cressi Giotto yourself, as it uses a user-replaceable battery compartment. This means you do not need to send it away for servicing, saving both time and money. The process is straightforward and requires only a coin or screwdriver to open the compartment. Always use the recommended battery type to maintain water resistance.
Is the Cressi Leonardo good for beginners?
+
The Cressi Leonardo is well-suited for beginners due to its simple interface and clear monochrome LCD. Its single-button navigation keeps things straightforward, and the display is easy to read even in low light. With a maximum depth of 120m and nitrox support, it covers most entry-level needs. At £176.99, it is also one of the most affordable options for new divers.
How accurate is the Cressi Leonardo depth reading?
+
The Cressi Leonardo provides reliable depth readings, with accuracy suitable for recreational diving. During testing, depth measurements matched those from more expensive models within 0.2 metres. Its RGBM algorithm ensures safe decompression calculations, and the display updates in real time. For most divers, its precision is more than adequate for safe diving.
What display does the Shearwater Perdix 2 use?
+
The Shearwater Perdix 2 uses a 2.2-inch colour LCD display, which is bright and highly customisable. This screen remains clear in low visibility and is easy to read with thick gloves. The colour coding helps highlight critical data, and the layout can be adjusted to suit your preferences. It is one of the most readable displays available in 2026.
Which dive computer is best for liveaboard trips?
+
For liveaboard trips, the Shearwater Perdix 2 is the top choice due to its 42-hour battery life and large dive log capacity. You will not need to recharge or clear logs during a week of diving. The robust build and 260m depth rating also add peace of mind. Alternatives like the Suunto Eon Core require more frequent charging and offer less storage.
Which dive computer is best for technical divers UK?
+
Technical divers in the UK should consider the Shearwater Perdix 2, which supports multiple gases, advanced decompression algorithms and up to four air transmitters. Its 260m depth rating and 1,000-hour logbook are ideal for extended and deep dives. The customisable display and Bluetooth connectivity make it suitable for complex dive planning and analysis.
Is there a dive computer with a user-replaceable battery?
+
Yes, both the Cressi Leonardo and Cressi Giotto feature user-replaceable batteries. This allows divers to swap batteries themselves, avoiding service delays and costs. The battery compartments are easy to access, and replacement takes only a few minutes. This feature is particularly useful for travel or remote diving locations.
Other dive computer included in the test
These models were tested but did not make the top 5
