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Best Dive Computer of 2021: Reviews with Comparisons

Last updated: October 14, 2021
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Best Dive Computer of 2021

If you are an avid scuba diver or just getting into diving, you might want to use a good dive computer.

A dive computer will keep you safe and sound, so it is vital.

That said, finding a quality dive computer that is affordable is easier said than done.

This article discusses some of the best dive computer models, what you should be looking for when shopping for one, and provides answers to some of the most frequently asked questions.

Best Dive Computer Reviews

Cressi Scuba Diving Computer

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This is a relatively high-quality dive computer that is very user-friendly and comes with all the essential features you would expect a dive computer like this to have – and it’s reasonably priced.

Product Highlights

First off, this dive computer comes from Cressi, a highly trusted Italian brand in the business for over 75 years.

This brand manufactures high-end, durable, and long-lasting products.

The Cressi Scuba Diving Computer is made with materials durable enough to easily withstand some bumps. It is considerably more durable than we would expect a dive computer at this low price to be.

In terms of functionality and ease of use, the Cressi Scuba Diving Computer has just three buttons, which many see as a bonus because there aren’t many buttons to master.

It is a straightforward and intuitive dive watch computer that even beginners should be able to easily use.

The Cressi Scuba Diving Computer features air, nitrox, and gauge diving modes, which should be more than enough for most.

In addition, this dive computer provides all the diving information you need to be safe, such as depth, decompression needs, dive time, surface intervals, and ascent rates.

Keep in mind that the Cressi Scuba Diving Computer has a dive program that lets you access all dive information from air and nitrox dives.

The data can then be downloaded to a PC.

The Cressi Scuba Diving Computer also allows you to set the FO2 parameters as required, with you being able to adjust it from 21% to 99% and the PO2 between 1.2 and 1.6 bar.

In addition, this unit features a backlit display with large and bold characters, so it is easy to read.

It also has a built-in calendar and clock.

Finally, there’s an onboard logbook that can store information of up to 60 dives or 70 hours of diving.

The Good

The Cressi Scuba Diving Computer is just an all-around good dive computer considering its low price.

It may not be the most functional dive computer, but it is more than good enough for basic diving, and considering the price, there is nothing to complain about.

The Bad

One significant downside of the Cressi Scuba Diving Computer is that the batteries are not rechargeable; they will last a long time, but they will need to be replaced once they are dead.


  • Durable
  • Bright
  • Easy to read
  • Good basic features
  • Great price
  • User friendly
  • Can connect to PC


  • Non-rechargeable batteries

Shearwater Research Peregrine Dive Computer

41W2AhDtJ8L. SL500

Suppose you are looking for a very high-quality dive computer with many dives modes, great functionality, and more. In that case, the Shearwater Research Peregrine Dive Computer is one to look into, keeping in mind that it does have a somewhat substantial price tag.

Product Highlights

Shearwater is one of the most highly trusted brands for professional-quality diving gear, and we can see why when we look at the super tough and durable Peregrine Dive Computer. This item is mainly made of stainless steel and equally strong materials that can withstand diving to insane depths, plus it should handle some bumps and scrapes.

In case something goes wrong with it, there is a two-year warranty.

You may appreciate the 2.2” LED LCD display with a very vivid and enhanced color range; it’s very bright, which makes it easy to see at all times.

This model features only two buttons for control, which some might not like, but for us, this makes it easier to navigate because you don’t have master multitude buttons. Moreover, the structure and layout of all of the functions make the Shearwater Research Peregrine Dive Computer easy to navigate with nothing more than these two buttons.

There are four dive modes, including nitrox, air, three-gas nitrox, and gauge diving, which should be more than enough for mostly all professional and recreational applications. In addition, it provides you with real-time information on all vital dive parameters.

Something else that makes the Shearwater Research Peregrine Dive Computer so remarkable is that it will never lock out dive plan deviations.

The other thing worth mentioning is that it has a rechargeable battery, with about 30 hours of battery life per charge.

The Good

What we really like about the Shearwater Research Peregrine Dive Computer is its awesome display. It’s one of the best dive computer displays we’ve ever seen. However, this is not a cheap dive computer, but we think it’s worth the investment based on its high level of functionality and durability.

The Bad

One of the downsides is that the Shearwater Research Peregrine Dive Computer cannot be used for freediving. It is also not an air-integrated computer.


  • Superior durability
  • Excellent battery life + rechargeable
  • Four dive modes
  • Complete dive parameters
  • Easy to read display
  • Easy to navigate


  • Not cheap
  • Not air integrated

Mares Nemo Wide Dive Computer

This is a very basic and affordable dive computer that should be ideal for basic recreational diving. It’s nothing super fancy or advanced, but it works well, and it won’t cost you an arm and a leg.

Product Highlights

While this is one of Mares’ lower-end entry-level dive computers, it is surprisingly functional and durable for the price. This item is made with a combination of rubber and nylon reinforced composite, so it can handle some bumps, not to mention that it has a near 500-foot depth rating, which is likely deeper than you will ever go.

What is also nice about the Mares Nemo Wide Dive Computer is that it comes with an extra-wide screen with a wide 170 degree viewing angle with backlighting. The bold and large characters make this dive computer easy to read, no matter the conditions. In addition, the unit features four buttons, each with its own specific functions.

Most people hail the Mares Nemo Wide Dive Computer for being so easy to navigate, plus the integrated software is upgradeable.

The Mares Nemo Wide Dive Computer comes with air, BT, and nitrox dive functionality; it is programmable and provides you with all the real-time dive parameters you need to be aware of. On a side note, what is really cool is that this unit is altitude adjustable just so you can adjust for your diving location.

Something that can be seen as both good and bad is that the Mares Nemo Wide Dive Computer has replaceable batteries, and you can replace them. So while the battery life is not fantastic overall, and while there is no option for charging, at least you can pop in new batteries when needed. This unit also has a clock, calendar, and audible alarms.

The Good

The best thing about the Mares Nemo Wide Dive Computer is how affordable it is. When it comes down to it, this is one of the most affordable dive computers, at least if we are talking about the affordable ones that actually work. Although this unit is nothing groundbreaking, it works just fine.

The Bad

Non-rechargeable batteries can be a bad thing, depending on how you look at them. Moreover, it needs a cord to connect to the computer, not to mention that it is pretty sizeable.


  • Very affordable
  • Good for basic needs
  • Decent durability
  • User-replaceable batteries
  • Good set of basic functions
  • Very large and easy to read display


  • Heavy and bulky
  • Software can be a bit slow at times

Scubapro G2 Wrist Dive Computer

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If you’re looking for a model that is more or less a supercomputer for diving, with all of the functions and features you could imagine, this high-end and quite expensive dive computer could be right for you. 

Product Highlights

One of the best features of the Scubapro G2 Wrist Dive Computer is the 2.2” full-color TFT dot matrix display. This is one of the nicest, brightest, clearest, and easiest to ready dive computer displays. Of course, the vibrant and clear colors help.

This screen is designed with efficiency in mind, so it won’t waste battery life. The Scubapro G2 Wrist Dive Computer comes with a rechargeable battery that will last for well over 24 hours on a single charge and that with maximum power usage.

When it comes to durability, you can expect this super high-end dive computer to last. It is built with the best and most durable materials, enabling it to dive to 120 meters with ease, not to mention that it can easily handle some bumps, drops, and scrapes.

Just in case something does happen, the Scubapro G2 Wrist Dive Computer has a full manufacturer’s warranty.

The Scubapro G2 Wrist Dive Computer is a fully functional and extremely high-end dive computer that comes with literally all the functions that even the most advanced divers need.

On that note, one of the most remarkable features is the Multi-Gas ZHL-16 ADT MB algorithm that can program for up to eight gas/nitrox mixes. Simply put, the Scubapro G2 Wrist Dive Computer should be more than ideal for all types of diving.

The Good

Besides the fact that the Scubapro G2 Wrist Dive Computer can do literally everything that you could imagine a dive computer to do, it also has a transmitter, as well as being able to integrate up to nine transmitters.

The Bad

Quite honestly, the only bad thing that we can see about the Scubapro G2 Wrist Dive Computer is the price. Admittedly, this unit is expensive, but if you need maximum quality and functionality, this is an investment worth making.


  • Superior durability
  • Awesome functionality
  • Ideal for virtually all types of diving
  • Excellent battery life + rechargeable
  • Amazing display
  • Can handle up to nine transmitters (one is included)
  • More or less a supercomputer


  • Quite pricey

SUUNTO Eon Core Wrist Computer

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Let’s end our reviews with another very high-end dive computer from the highly trusted and reputable Suunto brand. If you are willing to invest in a dive computer of quality, this SUUNTO Eon Core Wrist Computer is worth a closer look.

Product Highlights

First, the SUUNTO Eon Core Wrist Computer has excellent battery life. The batteries are rechargeable, and they will last for up to 20 hours per charge. This unit also comes with an energy-efficient display that won’t eat through battery life too fast. Even better is that once the battery dies, it is user-replaceable (you don’t have to send it to the factory to have it replaced).

This model has an absolutely massive display with extremely high resolution, brightness, clarity, and color vividness/saturation, and backlighting. While it’s a bit heavy and bulky (it weighs almost 1 pound), it is very easy to read.

On that same note, thanks to the easy three-button system, the SUUNTO Eon Core Wrist Computer is also very user-friendly and simple to navigate.

In terms of five modes, the SUUNTO Eon Core Wrist Computer has nitrox, air, gauge, CCR, and trimix, and it provides you with real-time information for all relevant dive parameters.

You would expect this model to be the top choice on the list today because of its functionality and features. Admittedly, it is pretty expensive, but you get what you pay for, and what you get is quality and a level of functionality that is ideal for even the most hardcore divers.

The Good

Simply put, the good thing about the SUUNTO Eon Core Wrist Computer is that it is a professional-quality and high-end dive computer that does everything you would ever need a dive computer to do. It’s just a fantastic product overall.

The Bad

One of the only downsides that we see with the SUUNTO Eon Core Wrist Computer is that the strap is somewhat uncomfortable, but it can be replaced. There’s also the fact that this unit costs a small fortune.


  • Superior durability
  • Many dives modes
  • Provides you with all relevant info
  • Great connectivity
  • Fantastic display
  • Great battery life
  • Looks quite nice
  • Easy to navigate


  • The strap is not the best
  • A bit bulky and heavy

Buyer’s Guide

When you start shopping to buy a dive computer, there are a few things to consider.


You should look for a dive computer that has a good display, like an HD LCD or a full-color TFT display, something that has excellent resolution, color quality, and large writing that is easy to read. On that same note, go for a display that features backlighting.


Some dive computers have simple, replaceable batteries, some have rechargeable batteries, and some have rechargeable batteries that can be replaced by the user once they finally die, with the third of these options being decidedly best. On a side note, look for a model that can last for at least 10 hours on a single charge.

Depth Rating and Overall Durability

A good dive computer needs to have a good depth rating, so you can go to substantial depths without compromising the unit’s integrity. On that same note, you also want to look for a made with durable materials that will not break in the event of a fall or drop.

Air Integration

Something essential to know is that basic dive computers are just for depth and navigation readouts, but they don’t come with air integration, so you can hook up the air hose and get readings. If you want an air-integrated dive computer, you will pay extra for it. Nitrox integration is something to look for as well.

Dive Modes

You also need to make sure that the dive computer allows for the specific type of diving, whether that be air, nitrox, EANx, gauge, freediving, or CCR.

Other Important Features

There are a few other important features and aspects, including the following.

  • Manual vs. water activation
  • Size and weight
  • Strap or buckle style
  • Console vs. wrist mounted
  • Integrated compass
  • PC compatibility
  • Memory functions
  • Decompression calculations
  • Transmitters

Frequently Asked Questions

Can Diving Computers Be Worn as Normal Watches?

Most modern dive computers also function as an everyday watch/calendar/alarm, although generally speaking, using a dive computer for time-telling is probably overkill.

How Deep Can Dive Computers Go?

The best dive computers that integrate fused RBGM into the mix can potentially go as deep as 150 meters (roughly 500 feet).

How Long Will a Dive Computer Last?

You can expect a dive computer to last for up to 8 years or 4,000 dives with reasonable care and maintenance.


Our choice for the top dive computer is the Scubapro G2 Wrist Dive Computer. It might be expensive, but it is more or less a supercomputer designed for even the most hardcore divers.

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