2018 Suunto D4i and D4i Novo – What are the differences?
Suunto D4i Novo White

What's the difference between the Suunto D4i and D4i Novo?

Suunto re-designed the D4i dive computer and released the Suunto D4i Novo. There are 3 notable differences between these two dive computers which are mostly cosmetic and minor. 

In this review, we'll look at the differences between these models, as well as compare it with other watch sized dive computers. 

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If you already know that the Suunto D4i Novo is for you, click on the button below to see the current price and any discounts that may apply on Amazon.

Suunto D4i Novo Dive Computer

Suunto D4i Novo Dive Computer - Black

Click the item in the table below to skip to the answer of your most pressing question, or continue to scroll to read the entire review.

D4i and D4i Novo Dive Computer Comparison Chart

Suunto D4i and D4i Novo are very similar dive computers. The comparison table below highlights their differences.

  • Choose yourdive computer

  • WeightWeight
  • USB IncludedUSB Included
  • Band TypeBand Type
  • Wireless Air IntegrationWireless Air Integration
  • Color ChoicesColor Choices
  • CompassCompass
  • PricePrice
  • Suunto

  • D4i

  • Weight85 g / 3 oz
  • USB Included
  • Band TypeElastomer
  • Wireless Air IntegrationOptional Extra
  • Color Choices
  • Compass
  • Price$685 MSRP*
  • Suunto

  • D4i Novo

  • Weight92 g / 3.25 oz
  • USB Included
  • Band TypeSilicone
  • Wireless Air IntegrationOptional Extra
  • Color Choices
  • Compass
  • Price$825 MSRP*

*MSRP = Is the manufacturer’s suggested retail price. There are big savings available on the recommended retail price online.  

Does the Suunto D4i come with the USB cable?

The Suunto D4i Novo comes complete with the USB cable. This cable lets you to download the dive log to a laptop and also update the firmware. 

The Suunto D4i does NOT come with the cable.  This is an optional extra. The USB cable retails for around $85 which helps explain the some of the price difference between the D4i and the D4i Novo.

There are package deals available from time to time where you can buy the D4i complete with the USB cable. These bring the price between the two models closer to each other.

Suunto D4i Novo White

Suunto D4i Novo White

What are the main differences between the two Models?

The internals and functions of the two dive computers are the same.

The case of the D4i Novo is .25 oz heavier (7 grams) than the Suunto D4i.  Both are compact and lightweight.

Cosmetically, the screen face and buttons are slightly different. The D4i has plastic buttons which have been changed to metal buttons on the D4i Novo. Suunto released the Novo with a silicone band. Silicone is noticeably smoother than the elastomer band and wraps around the wrist easier. 

As mentioned above, the USB cable needed to download the dive log is included when you buy the Novo. This remains an accessory at an extra cost when buying the D4i.  Apart from these minor differences, the Suunto D4i and the D4i Novo share the same features and functionality. The Novo is available in more color choices.

What’s the difference between the D4i and the D6i Novo?

Wondering what the differences are between the D4i, the D4i Novo and the D6i Novo? 

The Suunto D6i Novo has a built in compass, can handle up to 3 gases and has a maximum depth of 150 meters. It also has a sapphire crystal display.

  • Choose yourdive computer

  • WeightWeight
  • USB IncludedUSB Included
  • Band TypeBand Type
  • ButtonsButtons
  • Color ChoicesColor Choices
  • DisplayDisplay
  • CasingCasing
  • CompassCompass
  • Maximum DepthMaximum Depth
  • GasGas
  • Price ApproxPrice Approx
  • Suunto

  • D4i

  • Weight3 oz / 85 g
  • USB Included
  • Band TypeElastomer
  • ButtonsPlastic
  • Color Choices
  • DisplayMineral Crystal
  • CasingComposite
  • Compass
  • Maximum Depth100 meters
  • Gas1 Gas
  • Price ApproxUnder $500
  • Suunto

  • D4i Novo

  • Weight3.25 oz / 92 g
  • USB Included
  • Band TypeSilicone
  • ButtonsMetal
  • Color Choices
  • DisplayMineral Crystal
  • CasingComposite
  • Compass
  • Maximum Depth100 meters
  • Gas1 Gas
  • Price ApproxUnder $700
  • Suunto

  • D6i Novo

  • Weight3.98 oz / 113 g
  • USB Included
  • Band TypeChoices
  • ButtonsMetal
  • Color Choices
  • DisplaySapphire Crystal
  • CasingSteel
  • Compass
  • Maximum Depth150 meters
  • Gas3 Gases
  • Price Approx$950 - $1300

How big is compact?

The Suunto D4i and D4i Novo is a large watch sized dive computer. Many people wear it as their every day watch, especially when on vacation.

These measure 1.91″ x 1.72″ (48.6 mm x 43.8 mm) across the face, and .63″ thick (16 mm).

The D4i weighs in at 3 oz (85 grams) and the D4i Novo weighs 3.25 oz (92 grams).

How Big is Compact?

The Suunto D4i and D4i Novo is a large watch sized dive computer. Many people will wear it as their every day watch, especially when on vacation.

These measure 1.91″ x 1.72″ (48.6 mm x 43.8 mm) across the face, and .63″ thick (16 mm). The D4i weighs in at 3 oz (85 grams) and the D4i Novo weighs 3.25 oz (92 grams).

The bezel is stainless steel with a mineral crystal display. The dot matrix screen is large enough to display all the essential diving data.

Suunto D4i Novo Pink

What about Diving Modes and other settings?

The D4i and D4i Novo have 4 operating modes, Nitrox/Air, Free Diving, Gauge and Off. Switching to the Off option will stop the dive computer going into dive mode if you’re snorkeling. 

Both the Suunto D4i and D4i Novo have an electro-luminescent back light. The duration of the display can be adjusted between 5, 10, 20, 30, and 60 seconds, or turned off altogether. The brightness of the back light and the Display contrast can also be adjusted.

It’s easy to set it to display either metric or imperial settings depending on your personal preference. The time settings can formatted to either 12 or 24-hour display.

The Altitude setting is adjustable to 3,000 meters. 

There's a Stopwatch, Apnea timer and Alarm clock. It also has a dual time function which allows you to keep track of the time in a second time zone. The Dive mode will activate automatically when you dive deeper than 4 feet (1.2 meters), unless it’s previously been switched to OFF mode.

Diving in Nitrox mode increases your bottom times. The Suunto D4i and D4i Novo adjust their dive calculations to keep you within safe limits and reduce the risk of decompression sickness. After entering the percentage of oxygen in your tank and the oxygen partial pressure limit into the dive computer, the safe maximum operating depth (MOD) is calculated.

How to make adjustments to the settings

An advantage Suunto has over some of its competitors, is its intuitive menu. The short video below shows how to change basic settings on the D4i, D6i and DX range of Suunto dive computers.

Dedicated Freediving Apnea Computer – Suunto D4F

The Suunto dive computer models that have a Free Dive mode are the D4i and D4i Novo, and the D6i Novo.

Suunto have a dedicated watch sized dive computer for Freediving. Click the link to read more about the features of the dedicated Suunto D4F Free Diving Dive computer.

Does the D4i Novo have Wireless Air Integration?

In the world of diving computers, wireless Air Integration (AI) is increasing in popularity. AI technology and reliability has improved greatly in recent years.

The Suunto D4i and D4i Novo both have the capacity to upgrade to wireless AI with the purchase of a transmitter. The Suunto wireless Air Integration transmitter is an accessory. Having this capability is a great option for mid level divers who want to upgrade their gear or training later on. There are combo packages available that’ll save you money if you buy the transmitter at the same time as the dive computer.

The air integration feature reads your cylinder pressure. It then calculates and displays your remaining pressure and breathing time. This is based on the current depth and air consumption rate.

The transmitter pairs with the diver computer to display your tank information on your wrist. It retails for between $430 – $450.

Wireless Air Integration

What other divers are saying on Scubaboard.com

Can you dive without wireless air integration? Yes. Will wireless air integration make your dives easier, more accurate, safer, and more enjoyable? Yes.

You’ll appreciate that your dive computer has wireless Air Integration when you’re penetrating a long and narrow passage in a wreck. With the quick flick of the wrist, you’ll see all the vital info you need with very minimal movement.

Suunto D4i Novo Dive Computer Black

The bezel is stainless steel with a mineral crystal display, and the dot matrix screen is large enough to display all the essential diving data.

Suunto D4i Novo WhiteSuunto D4i Novo White

Is the battery of the D4i Novo user-changeable?

Well, that depends on who you ask!

Suunto state on their website and in the user manuals for the D4i and D4i Novo, that the battery must be replaced at an authorised center. It says that the battery change is not something you can do yourself. Having said that, there are Suunto D4i battery replacement kits for sale on the internet.

It really comes down to you, and whether you’re comfortable doing this yourself. The Suunto battery replacement kits include the battery, o-ring and a small tube of silicone grease.

One option is to buy the battery replacement kit yourself and take it and the dive computer to your local dive shop for replacing. This way you won’t be voiding the warranty, and you will save yourself a few dollars at the same time. Make sure you check with your local dive shop beforehand. 

The life expectancy of the battery depends a lot on how you use it. Based on around 100 dives a year, the battery life will be around 12 to 18 months. The life expectancy will decrease if you’re diving in very cold water. If its used in Time Mode only, the battery life will extend to around 2 years. 

What about Automatic Safety Checks?

The Suunto D4i automatically goes through a series of checks each time you enter Dive mode.

When entering DIVE Mode, the back light and beep activate. This is followed by the graphical display elements turning on. The Altitude and personal settings are displayed along with Maximum Operating Depth (MOD), gas content, and PO² values. The battery level is also checked.

If you’re between consecutive dives, your current tissue saturation is also included as part of these checks. The PLAN Mode shows your desaturation times based on your previous dives.

When in DIVE mode the current Depth, Surface Interval time, No Fly times, dive time and temperature are shown. AIR settings will show tank pressure pairing and the tank pressure alarm when paired with the wireless air transmitter.

Standard Alarms, Warnings, and Safety Stops

As we all know, Safety stops are part of good diving practice and are a critical part of most diving plans. The Suunto D4i and D4i Novo display two different types of safety stops – recommended and mandatory. There are audible and visual alarms that will alert you to important limits or when presets are being reached. 

With every dive over 30 feet (10 meters), there’s a 3-minute countdown for the recommended safety stop. This stop is taken in the 10 to 20 feet (3 to 6 meter) range. A STOP icon and a 3 minute countdown is displayed.

The default setting of the depth alarm is set to 100 feet (30 meters). This can be adjusted or switched off.

Suunto D4i Novo Sakura Diving Computer

Suunto D4i Novo Sakura (Pink) Diving Computer

Which actions trigger High and Low Priority Alarms?

  • Alarms
  • High Priority
  • Low Priority
  • Free dive alarms

This is a full decompression computer, so it will show the stops required if you run out of decompression time.

Visual alarms include:

  • Do Not Fly
  • Extend surface interval.
  • Violated decompressing ceiling or bottom time is too long.

It’s important to note that if the backlight is set to OFF, the dive computer will not illuminate when an alarm sounds.

Suunto D4i Novo Lime


Suunto D4i Novo Lime

Planning a No Decompression dive

The mode PLAN NoDeco is used to plan dives to avoid deco stops.

Enter the depth of your next dive into the dive computer. The dive computer will then calculate the maximum time you can stay at that depth without requiring a decompression stop during your ascent. Suunto dive computers include all dives taken over the previous 4 days when making their calculations.

What about the Logbook Memory, Bookmarks and Dive History?

The Suunto D4i and D4i Novo have a detailed logbook and dive history available in MEMORY mode.

  • Logbook
  • Bookmarks
  • dive history

Logbook contains a detailed dive profile for each recorded dive.

Sample Rate - The time between each data point saved in the log, is based on the sample rate. The default sample rate is 20 seconds which can be adjusted.

Logbook Capacity depends on the sample rate. Based on the default sample setting of 20 seconds and without the transmitter, the capacity is around 140 hours worth of dive time. With transmitter data, the capacity is reduced to a minimum of 35 hours. 

If the dive computer memory is full, the oldest dives are deleted as new dives are added. In Dive History view, you can switch between SCUBA History and FREE DIVE History.

Warranty and General Maintenance

All Suunto dive computers are covered by a 2 year manufacturer’s warranty. This doesn't cover normal wear and tear. The wireless air transmitter comes with a 12 month warranty. 

To keep the dive computer performing as it should, it needs to be serviced at an authorized Suunto service center every 2 years, or after 200 dives. A standard service includes a general operational check, replacing the battery and a water resistant check.

Although they can withstand the rigors of diving, dive computers need to be treated with the proper care and respect. Protect it from shock, extreme heat, direct sunlight and chemicals. It should go without saying, but take extra care not to knock or drop it.

After using in salt water, always rinse in fresh water and a mild soap. Carefully clean the housing with a moist soft cloth or chamois.

Clean the water contact and depth sensors on the side of the computer using fresh water and a soft toothbrush. The water contact is what detects when the unit is submerged and switches it into Dive mode. After washing and drying, store in a dry place.

Take it to a Suunto service center as soon as possible if moisture appears inside the case or battery compartment, and never try to open the case of the dive computer.

The Conclusion?

Suunto D4i Novo Dive Computer - Sun

Suunto D4i Novo Dive Computer - Sun

Time To Select! Suunto made adjustments to the D4i, and released the D4i Novo. The D4i is still readily available for sale. The Suunto D4i and D4i Novo are both are great quality dive computers packed with features.

Air Integration is a nice touch but the transmitter can always be added later on if your budget doesn’t quite stretch that far at the moment. Those who’ve made the switch to wireless air integration, say they’d never go back. (Scubaboard.com)

A question to ask yourself is whether you want to download your dive logs to your computer. If yes, then buy the Suunto D4i Novo. If this isn’t as important to you, then you may want to consider saving yourself some money and buy the Suunto D4i.

Suunto D4i Novo Dive Computer - Sun

Suunto D4i Novo Dive Computer - Sun

Suunto made adjustments to the D4i, and released the D4i Novo. The D4i is still readily available for sale.

The Suunto D4i and D4i Novo watch sized dive computers packed with features.

Air Integration is a nice touch but the transmitter can be added later on if your budget doesn’t quite stretch that far at the moment. Divers who’ve made the switch to wireless air integration, say they’d never go back. (Scubaboard.com)

A question to ask yourself is whether you want to download your dive logs to your computer. If yes, then buy the Suunto D4i Novo. If this isn’t as important to you, then you may want to consider saving yourself some money and buy the Suunto D4i.

Suunto phased out manufacture of the Zoop and the D6i earlier this year, leaving only the Novo versions of these two dive computers in their range. My guess is that it won’t be long before the Suunto D4i is also discontinued, leaving the Suunto D4i Novo. There could be some great bargains coming up for the D4i before this happens.

Suunto D4i Novo Dive Computer

Suunto D4i Novo Dive Computer - Black

Authored by Sharon Swanson

Reviewed by Terence Moore  PADI MSDT 101658

Since taking up Scuba diving in 1983, Terry Moore has been diving at some of the world's greatest dive spots, and to date has over 3,000 dives under his belt. As well as being a PADI Diving Instructor, Terry has worked in the offshore live-aboard diving industry teaching Underwater Photography and other specialty courses. 


Terry has dived off the island of Tortola in the British Virgin Islands, Australia, Papua New Guinea, Fiji, Palau, Truk Lagoon, Belize C.A. and numerous places throughout the Caribbean. He's pretty much dived wherever there was water deep enough to dive in.


You can visit Terry's website at: ​www.padidivepro.com


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