Oceanic Pro Plus 4.0 Scuba Diving Computer Review: Syncs Dive Data with the DiverLog+ Smartphone App

What the Pro Plus 4.0 Is, and Who For

Oceanic Pro Plus 4.0 Scuba Diving Computer tracks dive profiles and syncs with the DiverLog+ App for users who need to review their underwater data on a smartphone.

Syncing your dive data to a smartphone allows you to add photos and videos to the DiverLog+ app for a more complete record of your underwater experience. The Oceanic Pro Plus 4.0 facilitates this through Bluetooth connectivity, moving your dive profiles from the unit to your mobile device.

This model also offers a polycarbonate (PC) body and a 2.1 Pounds weight, balancing durability with a portable form factor. It features an optional quick disconnect attachment with a twisting locking ring for easy removal from your gear.

We selected the Oceanic Pro Plus 4.0 from the 15 scuba diving computers we evaluated because it is one of the most-rated products that pass screening, with 57 buyer ratings. This review is for those who want to keep a detailed digital log of their excursions. Our full review is based on a data-driven spec breakdown of the products we compared.

If you are considering a different option, read our full review of the Puck Pro+.

The Short Answer on the Pro Plus 4.0

Best for: you need a scuba diving computer that allows for custom gas mixes and integrates with a smartphone app for dive logging.

The Oceanic Pro Plus 4.0 is a capable choice at the $1199.95 price point.

• Pro: The adjustable dual Nitrox mixes allow you to program specific gas percentages for different dive stages.
• Pro: Bluetooth connectivity enables you to download dives directly to the DiverLog+ app on a mobile device.
• Pro: The 4.4 rating from 57 buyer ratings indicates a consistent experience among previous owners.
• Con: The 2.1-pound weight may feel heavy on the wrist compared to lighter, more compact underwater computers.
• Con: The polycarbonate (PC) construction is a plastic material that may lack the impact resistance of metal housings.

Don’t buy this if: you require a device with a metal housing or a weight under 2.1 pounds for your specific gear setup.

Price assessment: The $1199.95 price is a premium investment for a computer featuring advanced gas mixing and app synchronization.

You might also want to see the Cressi Donatello performance breakdown for comparison.

Divers using enriched air should view the best dive computer for nitrox.

The Numbers on the Spec Sheet

The item dimensions of 12 x 5 x 3 inches measure the physical space the device occupies, which determines how much room you need for storage or transport.

How this Scuba Diving Computer Performs in Practical Terms

Bluetooth Smartphone Integration

Bluetooth connectivity allows the Pro Plus 4.0 to sync with the DiverLog+ app to download dives to a mobile device. This connection lets you view recent dive profiles and information on your phone after your session. You can also add photos and videos to the app to keep a digital record of your underwater activity.

The Pro Plus 4.0 includes mobile device alert settings for time and depth to provide notifications on your smartphone. Because the device syncs via Bluetooth, you can manage your data without needing a physical cable connection. These features move your dive data from the underwater computer to your personal mobile device for easier sharing and review.

Customizable Gas and Algorithm Settings

You can set up specific gas mixes for technical diving because the Pro Plus 4.0 supports adjustable dual Nitrox mixes and adjustable gas mixes. These settings allow you to program the specific oxygen and nitrogen percentages for your cylinders. The device also features an adjustable dual algorithm to suit different diving requirements.

The Pro Plus 4.0 provides these gas mix options to ensure the computer calculates your limits based on the actual gas you are breathing. By adjusting the gas mixes, you can transition between different gas sources during a technical dive. These settings provide the specific parameters needed for complex gas management while you are underwater.

Large font size on this Scuba Diving Computer ensures easy readability

The Pro Plus 4.0 features a large display area with a large font size to ensure readability during a dive. This design choice allows you to see your depth and time remaining quickly without straining to read small characters. A larger font size provides a clearer interface when you need to check your status at a glance.

The display’s large font size works alongside the attached compass to provide a clear overview of your underwater environment. Since the font is scaled for high visibility, you can monitor your primary data points even in varying underwater conditions. This layout ensures that the most important information remains prominent on the screen throughout your dive.

Where the Pro Plus 4.0 Sits Among the Alternatives

The Oceanic Pro Plus 4.0 offers a specific advantage in gas management for technical divers who require adjustable dual Nitrox mixes and adjustable gas mixes. These features allow you to configure the computer for multiple gas types during a dive.

• The Shearwater Research Shearwater Perdix 2 13301 is $89.95 cheaper than the Pro Plus 4.0.
• The Garmin Descent Mk2i Titanium with Black Band provides an 80 hours dive mode battery life, compared to the 1 CR2 batteries required by the Pro Plus 4.0.
• The Garmin Descent Mk2S 010-02403-00 provides a 30 hours dive mode battery life.
• The Shearwater Research Teric Color Wrist Dive Computer offers wireless tank pressure support.

If you need a more budget-friendly option with a high buyer rating, the Shearwater Research Teric Color Wrist Dive Computer is the better pick.

For a different brand, view our spec analysis of the Suunto Ocean Dive.

What It Takes to Run This Underwater Computer

Powering and syncing the Pro Plus 4.0

To begin using the Pro Plus 4.0, you must have 1 CR2 batteries available to power the unit.

1. Unpack the device and the optional quick disconnect attachment with the twisting locking ring.
2. Insert 1 CR2 batteries into the battery compartment.
3. Pair the unit with a smartphone to sync with the DiverLog+ App for viewing dive profiles.
4. Configure the adjustable dual Nitrox mixes or gas mixes to match your specific gas plan.

Warranty and support: what to check

Warranty coverage and support terms vary depending on your specific seller and country of purchase.

• Confirm the 12 x 5 x 3 inch dimensions match your transport space to ensure the unit fits in your gear bag.
• Verify the Bluetooth connectivity functions with your specific smartphone model to ensure data syncing works.
• Check that the polycarbonate (PC) housing shows no cracks or defects to ensure the integrity of the underwater computer.

Perform a power-on test and verify the large display area font size is legible before you begin your first dive.

Questions Buyers Ask About This Scuba Diving Computer

How Bluetooth connectivity and syncing affects battery costs for this Scuba Diving Computer

The Pro Plus 4.0 syncs dive logs to a smartphone via the DiverLog+ App. This Bluetooth connectivity allows you to move data from the underwater computer to your phone for viewing recent dive profiles and adding photos or videos to the app.

The Pro Plus 4.0 uses 1 CR2 batteries for power. Because CR2 batteries are a standard size for many high-drain electronics, they are widely available for replacement. The cost of these batteries is a consistent factor in long-term ownership compared to rechargeable internal systems.

Think of the Bluetooth syncing like a digital tether that pulls your dive data from the water into your phone’s memory, similar to how a wireless speaker sends music from a phone to a room.

Frequently Asked Questions

Does the Oceanic Pro Plus 4.0 sync logs automatically?

The Pro Plus 4.0 syncs logs to your phone via Bluetooth connectivity with the DiverLog+ App.

How much does it cost to replace the batteries?

The Pro Plus 4.0 requires 1 CR2 battery for operation. You can find these standard batteries at most hobbyist or electronics retailers, making the long-term cost of power predictable and easy to manage.

Can I use different gas mixes?

Yes, the Pro Plus 4.0 features adjustable dual Nitrox mixes and adjustable gas mixes. These settings allow you to program specific gas percentages into the device for different types of dives.

What is the weight of the Pro Plus 4.0?

The Pro Plus 4.0 weighs 2.1 pounds. This weight is the total mass of the unit, which you can account for when choosing a mounting system or head strap.

Is the Pro Plus 4.0 Right for You?

Who the Pro Plus 4.0 suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Subsurface Computer

When we looked in November 2026, the Pro Plus 4.0 was listed at $1199.95 – a snapshot that may have changed since.

Scuba diving computers are sold by the retailers below – we do not track which of them has the Pro Plus 4.0 in stock, so check availability and the current price with the retailer before making a trip.

• REI (online and physical stores) — reliable inventory of major brands and in-store expert advice
• Amazon (online only) — massive selection and easy comparison of consumer models
• ScubaGear (online only) — specialist retailer with deep technical inventory
• Triton Sports (online and physical stores) — specialist retailer with expert staff and technical gear
• DiveInn (online only) — large online catalog for international and domestic brands
• Dick’s Sporting Goods (online and physical stores) — wide availability of mainstream brands and physical locations

If navigation is a priority, find the top rated scuba diving computer with gps.

Final Verdict on the Pro Plus 4.0

If you need a scuba diving computer that provides specific gas management for complex dives, the Oceanic Pro Plus 4.0 is a strong option at around $1,199.95. The Pro Plus 4.0 features adjustable dual Nitrox mixes and adjustable gas mixes, which allow you to program specific oxygen percentages for different gas tanks during a dive. This capability is useful for divers who do not stick to a single gas source. The device also includes an adjustable dual algorithm to tailor the decompression or no-decompression limits to your specific physiology.

The Pro Plus 4.0 includes an attached compass and a large display area with a large font size to improve readability underwater. You can sync the unit with the DiverLog+ app on a smartphone to download dive profiles and add photos or videos to your records. Connectivity is handled via Bluetooth. The unit uses 1 CR2 batteries for power.

You should choose this model if you require a high level of gas customization for technical diving. The Pro Plus 4.0 offers the specific Nitrox and gas mix adjustments needed for those scenarios.

You should choose the Oceanic Pro Plus 4.0 if you require a scuba diving computer that supports multiple gas mixes and provides a large, easy-to-read display for complex dive planning. This model is available for around $1,199.95.

The Pro Plus 4.0 features adjustable dual Nitrox and gas mixes, providing the specific programming depth needed for multi-gas diving. It also holds a 4.4 rating from 57 buyer ratings.

Skip it if: You only perform basic recreational dives with a single gas source and prefer a simpler interface without complex gas mixing options.