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People always ask us, “what is the one piece of dive gear I should buy first?”

Our answer is always the same: a dive computer!


Every diver should have their own dive computer and know how to use it. You should really never rely on someone else to keep track of your dive limits and safety.

You can always get away with renting the fins, BCD, and almost everything else from your dive center, but you always want the monitoring of your depth and no-deco times, etc, to be your responsibility.

So what’s the best dive computer for you?


There are a lot of dive computers out there, and this guide is designed to make it easy to find your best possible match, based on your budget, skill level, and the type of diving you plan to do.

If you can’t find something perfect for you here, we don’t know where else you will!

Quick Comparison
Suunto D5
  • High quality, reliable + long-lasting
  • One of the best dive computer brands
  • Super simple to use + highly customisable
  • Compact + stylish
Suunto D4i
  • Reliable + long-lasting
  • One of the best dive computer brands
  • Easy to set up + use
  • Compact design
  • More affordable than latest models but still an excellent computer
DeepBlu Cosmiq+
  • Rechargeable battery
  • Top-class digital app with logbook + social media integration
  • Intuitive set up + easy to change settings
  • Very affordable smart dive watch
Shearwater Teric
  • Highly intuitive + customisable smart dive computer
  • Compact + stylish
  • Suitable for tech
  • Premium quality construction
  • Arguably the best dive computer on the market
Garmin Descent Mk2
  • Top class smart watch + dive computer combined
  • Compact + stylish design
  • Suitable for tech
  • Easy to use + highly customisable settings
Suunto Zoop Novo
  • Super simple to use + read
  • Reliable + rugged construction
  • Very affordable
Shearwater Perdix
  • Compatiable with CCR + Multiple gas mixes
  • Reliable
  • Clear + easy to read display in all conditions
Oceanic Geo 4.0
  • Great value for money
  • Compact + stylish design
  • Clear + easy to read display
AquaLung I450T
  • Digital Compass + 4 dive modes
  • Compact design
  • Air-integrated + transmitter available
  • High-quality construction
Mares Matrix
  • Affordable compact dive computer
  • Easy to read display
  • Comes in a variety of colors
Cressi Leonardo
  • Great option for beginners on a tight budget
  • Easy to read display
  • Well-constrcuted + long-lasting
Suunto D6i Novo
  • Wireless transmitter for air-integration
  • Easy to read + simple to use
  • Variety of colors available
  • Well-constrcuted + long-lasting
Oceanic OCI
  • Variety of dive modes
  • Compact + sporty design
  • Variety of colors available
  • Well-constrcuted + long-lasting
Mares Puck Pro
  • Large + clear display
  • Super simple to use + set up
  • One of cheapest options

If you want to review these options or take a deeper look at our top choices, then keep reading…

The Full List of the Best Dive Computers for 2021

suunto d5 dive computer 254x300 1

Price: $929
GASES: Air & nitrox
FEATURES: Watch style, made in Finland, loved by beginners & pros
PROS: One of the best companies, customizable.
CONS: Expensive


The new Suunto D5 is designed to be so clear and easy-to-use that you can just enjoy and focus on exploring the wonderful underwater world. Play with style by changing the strap to match your looks. After diving, connect wirelessly to the Suunto app to re-live and share your adventures with friends.

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71yACuiBhL. AC UY218Price: $350
GASES: Air & nitrox
FEATURES: Watch, dive, gauge, and freedive modes
PROS: Rechargeable battery, digital app incl. log book & social media , compact size & slim design, simple to use, affordable
CONS: Hard to read in direct sunlight, not suitable for tech/trimix, no altitude option


If you’re a lover of new gadgets and staying connected then the Cosmiq+ from DeeperBlu might just be your perfect dive computer. Not only does it offer great functionality underwater, but it also integrates seamlessly via bluetooth with a top-quality app complete with a digital logbook and social media connections. 

But the app offers more than just a logbook you can share on Facebook, it also allows you to easily adjust and check all your dive settings including nitrox, alarms and other key data before you dive. No more awkwardly holding down buttons and scrolling through settings over and over because you keep clicking past the one you wanted!  

71FB2Tqk4 L. AC SL1500

Underwater the Cosmiq+ is a dream to use. The LCD screen is super clear in all conditions, displaying all the essential information you need. Plus the audible and visual alarms make it easy to stay within your limits. You can also set the computer to progressive, normal, or conservative mode. While it’s not suitable for tech divers, this computer gives recreational/sport divers all the options they could ever need including accurate dive planning, freedive, gauge and nitrox modes. 

Akin to your smartphone, this dive computer has a rechargeable lithium ion battery and magnetic USB charger. Once fully charged, it’ll do around 7 hours worth of diving before you need to recharge. 

We love the stylish and slim design, it’s significantly less bulky than most dive computers and you have the option to choose a strap design to suit your style. For less than $400, we were very impressed with the design and functionality! 

While there are cheaper dive computers that offer the same underwater functionality, the Cosmiq+ cannot be beaten when it comes to ease of use and out of water connectivity. 

The only downsides are that you do need to remember to charge it, there’s no altitude diving option and the LCD screen can be a little tricky to view in bright sunlight. But the other functions, and low price point, more than make up for it!

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best dive computer 238x300 1

Price: $1100
GASES: Air & nitrox, trimix
FEATURES: A favorite company for tec divers
PROS: One of the best companies, customizable, tec capable
CONS: Expensive


Intuitive controls and menu navigation along with a bright, vivid color display. With a high degree of customization, the Teric brings divers a timepiece and dive computer of unprecedented capabilities.

Though it’s made by a company renowned for its technical diving gear, the Shearwater Teric combines all the functionality needed for technical divers with a simple design, sleek enough to be worn every day by a recreational diver.

This Shearwater dive computer has technical diving features like 2 transmitter connectivity, configurable audible and haptic alerts, and nitrox, trimix, and rebreather capabilities.

The display is clear, bright, and simple to navigate. It is fitted with Bluetooth Smart technology, making connecting with your phone app easier than ever. The battery is user rechargeable and it also features a 3D, tilt-compensated compass.

The internet is flooded with fantastic reviews of the Shearwater Teric and it’s easy to see why – everything about it is slick, clever, and oh-so functional.

The only downside we can see is the price – at around $1000 without the transmitters, it is definitely at the luxury end of the market.

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garmin 1 300x300 1Price: $1000
GASES: Air, nitrox & trimix
FEATURES: Watch, dive, gauge, and freedive modes
PROS: Smartwatch, GPS, vibration alarms, supports trimix
CONS: Expensive


If you want a dive computer that can do more than just dive, then Garmin is a perfect choice. This innovative dive watch does it all.

The Mk1 builds upon Garmin’s formidable reputation as a maker of GPS systems, smartwatches, and activity trackers and combines it all into a small, easy to wear form factor that can withstand any type of diving thrown at it.

Garmin has recently released their newest version of this dive computer, the Garmin Descent MK2. Check out our full review of the Garmin MK2 and find out how it compares to its predecessor.

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oceanic dive computer 234x300 1Price: $400
GASES: Air, nitrox
FEATURES: Freediving mode, Deep stop with countdown timer
PROS: Affordable, easy to read
CONS: Not really user friendly


It took me a while to learn all the settings on the Geo 4.0, even simple things like changing the time, but in the end, I really liked this computer, and it was a LOT cheaper than a Suunto equivalent, and accordingly, to instructors I know, it is preferred for tec divers over more simple Suunto computers.

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Aqualung best dive computer 261x300 1Price: $700
GASES: Air, up to 3 Nitrox mixes
FEATURES: Multiple transmitters, digital compass, 4 dive modes
PROS: Easy to use, tons of features, great manufacturing
CONS: Expensive


Designed for the active diver, this computer by the world’s top dive gear manufacturer is one of the best on the market. It’s great for lots of diving, as well as daily wear as a watch. There are a ton of great features and modes.

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mares matrix best dive computer 223x300 1Price: $400
GASES: Air & nitrox
FEATURES: Single button navigation, large display
PROS: Affordable, user friendly, lots of color choices
CONS: not too bright display light


Now you can get a computer from Mares, if you love that brand and their other gear. It’s one of the best for the price, and it’s pretty good-looking as well. Mares is well known for great tec gear, so this should be a popular computer for them as well.

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cressi best dive computer 300x298 1Price: $200
GASES: Air & nitrox
FEATURES: Single button navigation, large display
PROS: Affordable, user friendly, lots of color choices
CONS: not too bright display light


The Cressi Leonardo is a great computer for beginners, and you can wear it daily, unlike a Zoop. It might even be cheaper than a Zoop, and looks a lot better. The Cressi Giotto is one step up from Leonardo, and about $100 more.

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perdix 235x300 1Price: $850
GASES: Air, nitrox, trimix
FEATURES: Multiple dive Modes, 2 button interface
PROS: Durable design, large display, big drysuit straps
CONS: No wireless air integration, huge & uncomfortable. Only for tec divers.


The Perdix AI. Offering all of the same great features of the Perdix, the Perdix AI uses its large, easy-to-read screen to clearly display the tank pressure as well as your gas time remaining (GTR). The Perdix AI is capable of connecting to either one or two transmitters giving the diver the option to monitor both tanks or dive sidemount.

The Shearwater Perdix AI is THE top of the line dive computer. This computer does it all and does it with style, reliability, and user-friendly interfaces. It boasts an easily readable 2.2” screen with full color and adjustable brightness settings.

The technical mode offers multiple user-programmable gas mixes including any mix of air, nitrox, trimix, and oxygen, with the ability to toggle during the dive.

Offering perfect options for recreational, technical, and rebreather divers, the Perdix AI is truly a cutting-edge and top-performing computer with easy usability, dozens of features, and simple reliability.

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suunto d6 review 245x300 1Price: $800
GASES: Air, Nitrox
FEATURES: Wireless Integration Capable, Free Diving Mode
PROS: Easy to use, lots of colors and wrist bands. Wear daily.
CONS: Expensive


Suunto is a top-of-the-line manufacturer and my personal favorite brand for dive computers. They are easy to use and come in many colors and styles. The D6i is the stepped-up version of the cheaper D4i that is super popular for divers of all levels.

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suunto dive computer 249x300 1Price: $500
FEATURES: Wireless Integration Capable, Free Diving Mode
PROS: Can Be Worn As A Watch, Lightweight
CONS: Expensive, No Digital Compass


Suunto D4i with air wireless integration is what I personally use the most. It has/does everything a recreational diver needs, and is cheaper than a D6i. I love this computer. It is super user-friendly, and easy to use, and widely available.

Check out our full review of the Suunto D4i and find out why it’s one of our all-time favorites.

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OC OCi BlackBlue 300x300 1Price: $700
GASES: Air & nitrox
FEATURES: Watch, dive, gauge, and freedive modes
PROS: Nice display, free diving mode
CONS: Slightly complicated, not trimix capable


This is my favorite Oceanic computer, and I really like it. It is slightly cheaper than a Suunto D6i at around $650, and has a lot of great features and looks good. Tec divers prefer it over Suunto a lot of the time.

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suunto best beginner dive computer 229x300 1Price: $350
GASES: Air & nitrox
FEATURES: Watch, dive, gauge, and freedive modes
PROS: Cheap, simple to use, long lasting
CONS: Big and bulky, not trimix capable


This is the most popular dive computer for beginners. It’s super simple to use, offers all the features you need and it’s very affordable. Plus, its rugged design means it’ll last you a very long time. The only downside is how big and bulky this computer is compared to the others on our list.

Check out our full review of the Suunto Zoop and find out why it’s one of our top dive computers for beginners.

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mares puck pro 264x300 1Price: $250
GASES: Air & nitrox
FEATURES: Watch, dive, and gauge mode
PROS: Cheap, easy to read display
CONS: Big and bulky, only one button navigation, not trimix capable


If you’re on a tight budget, this simple yet robust dive computer is a great choice. Although it’s not the best looking on our list, for its low price and easy to read screen, it’s ideal for new divers who want a safe and reliable computer without spending too much.

Check out our full review of the Mares Puck Pro and find out why it’s a great beginner dive computer or those on a tight budget.

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Before Buying a Dive Computer

Still not sure what one to go with, with all these great options? There are a few factors to consider when choosing the perfect computer for you, so let’s go through those, and then I will just give my recommendations and all-time favorites, that you can’t go wrong with.

dive computers

Your Budget

Obviously, you should think about your budget, check the prices in the links above, and that will be a big factor. But obviously, since there are a lot of options around the same prices, there will be more factors to think about.

How often will you dive?

If you are diving frequently, are a Divemaster or instructor, you are going to want a good watch that will last, as well as one that will log a lot of dives. If you are diving a few times a year, you don’t need the most top-of-the-line.

What is your qualification level?

Most of you reading this will be recreational divers, and do not need something very technical. Do you do mix gases? Do you use air integration? Will you need to be able to plan a dive table on your computer for tec diving? If not, don’t get something like the Shearwater Research. It is complete overkill, way too big and uncomfortable to wear, and too expensive for what you need. But if you are tec diving, it doesn’t get much better than that one.

Easy to use and set up

This also goes with how much you dive and how much experience you have with computers, but if you are like us, and DO have a lot of dives and experience with computers, yet still prefer something simple and user-friendly.

We have tried a lot of computers, and always seem to revert back to a Suunto. We’d rather not have to spend time figuring out a complicated computer, so we tend to stay away from most Oceanic or Shearwater, unless for tec.

But that’s just our opinion, and a ton of divers love Oceanic computers, with more options and settings.


Why Get Your Own Dive Computer?

Not only does a dive computer make your life much easier, but it also makes your dives much safer. And having your own dive computer means that you are able to accurately keep track of your own limits in real-time throughout the dive.

A dive computer provides you with all the information you need to stay safe and dive within your limits in real-time. It does all of the calculations for you, whilst also providing you with alarms and reminders, for example, automatically tracking your safety stop, applying emergency decompression stops if you exceed your limits, or beeping at you if your ascent is too fast.

None of this can be guaranteed with manual planning and tracking when you use decompression tables and a timing device and depth gauge. Even if you are the most experienced diver with all the knowledge, there is still plenty of scope for human error from the tiniest error in the calculations to not watching your depth for a few minutes of the dive, which can make a lot of difference and put you at risk of decompression sickness.

Besides the safety factor, a dive computer often allows you to make the most of your time underwater as it helps you to monitor your depth and remaining no-stop time during the dive. For example, if you start to shallow up you gain additional no stop time and can spend longer underwater.

Having your own dive computer allows you to be in control of your own safety, maximise your time underwater and helps keep track of your dives so you can update your log book (either manually or many newer models of Bluetooth or USB connections to upload your data to your smartphone or computer).

Can’t I just rent a dive computer from the dive center?

While many dive center’s do offer you the opportunity to rent a dive computer, it can be time-consuming and frustrating to figure out how the different models work. Having your own dive computer means that you know exactly how it works, and how to use it properly to monitor your dives and stay safely within your limits.

Plus, renting dive computers is usually charged per dive and that very quickly adds up across a few days or diving. While a dive computer feels like a big expense upfront it can actually save you a lot of money in the long run. Most dive computers will last you several years, if not decades when taken care of properly (you’ll probably have to replace a battery or two but this is very cheap).

And lastly, having your own computer means that you are using the same computer for all of your dives and it will keep an accurate reading of your no-decompression limits across multiple dives and multiple days of diving.


And there you have it!

These are the top dive computers on the market and depending on your needs, you can pick the best one for you!

Do you have a favorite that’s not on our list? Let us know in the comments below!

Alexa Worswick Administrator

Alexa Worswick is a PADI + SSI scuba instructor, experienced freediver, and travel writer. With over 15 years of scuba diving experience in many locations across 3 different continents, she’s now based in Indonesia.

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