Comparison

Prevent GD vs Diving Standard

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Prevent GD

Features
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The Prevent GameDay mobile app pairs with the Prevent Biometrics impact monitor mouthguard. The Prevent system provides near real-time, accurate head impact data to help teams make the right call about player safety. The Prevent GameDay app is designed for sideline monitoring of head acceleration events. Introduce actionable, objective data into the process of identifying athletes needing sideline evaluation. The Prevent GameDay app provides live alerts of high magnitude head impacts. This app requires at least one Prevent Impact Monitor Mouthguard to operate. Learn more at preventbiometrics.com or contact sales@preventbiometrics.com.

About

Diving Standard

Features
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Scuba. Freediving. Snorkelling and more. Everyone who loves the sea, in one place. CHECK THE SEA BEFORE YOU GET IN Water temperature, tides, currents, swell, wave height, water quality and estimated underwater visibility. One screen, so you know whether it is worth going before you pack your gear. Add the sea-conditions widget and you never even open the app. Today's verdict, sea temperature, a live tide curve and the light you have left, on your Home or Lock Screen every time you pick up your phone. YOUR WRIST BECOMES A DIVE COMPANION Depth, dive time, heart rate and NDL, live on Apple Watch Ultra. Every session logs itself. Max depth, duration, water temperature, dive mode, all written down without you touching anything. Stop tapping and start looking. FIND YOUR PEOPLE Local and global communities of sea lovers. Share trips, sightings and honest site reviews. Ask the question you are too shy to ask at the dive centre. Find a buddy near you, or someone on the other side of the world who is into exactly the same thing. SERIOUS ABOUT SAFETY NDL is calculated with Buhlmann ZHL-16C, the decompression model trusted across the industry. Safety alerts never auto dismiss. Critical numbers stay big, high contrast and glove friendly, because a screen you cannot read in low visibility is not a safety feature. A LOGBOOK WORTH KEEPING Every dive, every breath hold, every snorkel. Full metrics, full history, personal records. The record of your life in the water, not just the deep bits. BRING YOUR OLD LOGBOOK WITH YOU Years of dives somewhere else? Screenshot them and we read them for you. Suunto, Garmin, Shearwater, Subsurface, MacDive, Dive Log, PADI, SSI and most other dive apps, plus photographs of a paper logbook. No exports, no CSV files, no retyping. It happens on your phone, so the images never leave it, and you check every dive before it is saved. LEARN, FROM FIRST BREATH TO ADVANCED Built in courses across scuba, freediving and snorkelling. Sere you are. Track progress, earn completions, unlock advanced material as you go. Nobody starts as an expert. DESIGNED FOR THE DEEP Deep navy, bioluminescent accents, frosted glass. An interface that looks like the water it was made for and reads clearly in any visibility. WHAT IS INSIDE - Live depth, NDL, dive time and heart rate on Apple Watch Ultra - Automatic logging across scuba, freediving and snorkelling - Import your old logbook from another app with a screenshot - Full logbook with stats, history and personal records - Live sea conditions and estimated visibility - Home and Lock Screen sea-conditions widgets - Courses for all three disciplines - Community feed with photos, likes and comments - Buddy finder to connect with sea lovers near you - Privacy controls, including hiding your rough distance WHICH WATCH YOU HAVE Apple Watch Ultra: the full companion. All three modes with er temperature, heart rate and NDL. Sessions log themselves. Apple Watch Series 10 and later: the same three modes, the s automatic logging. Depth is capped at 6 metres by the hardware sensor. Plenty for snorkelling, breath hold practic Every other Apple Watch: Aqua Session. No depth sensor, no problem. Heart rate, compass bearing, GPS map and track, sea conditions and session duration. It will not measure depth, but it will tell you where you are, which way the boat is and what the sea is doing. No Apple Watch at all? Everything else runs on iPhone. The watch is a companion, not a gatekeeper. IMPORTANT This is not a dive computer and must not be used as your primary safety device. Depth is currently tracked to 6 metres, limited by the Apple Watch shallow depth sensor. Full 40 metre scuba tracking is coming in a future update, pending Apple entitlement approval. Always dive within your training and with appropriate equipment. Built with salt water.

Screenshots

Prevent GD4 screens
Diving Standard4 screens

Verdict

The call

The clearest difference is update cadence: Diving Standard at every 5 days against Prevent GD's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Prevent GD ships an update every 2 months, Diving Standard every 5 days. The most recent releases landed on September 28, 2026 and September 21, 2026 respectively.

Scorecard1 real difference ยท 5 level
Prevent GD versus Diving Standard: the parameters behind the verdict, then further details
ParameterPrevent GDDiving Standard
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.017.0
Further details โ€” not scored
Size6 MB77 MB
Age rating4+4+
DeveloperPrevent Biometrics, IncMismi Group Limited

In-app purchases

None

Prevent GD

No in-app purchases

None

Diving Standard

No in-app purchases

Questions

Is Prevent GD free?
Prevent GD is free to download, with no in-app purchases.
Is Diving Standard free?
Diving Standard is free to download, with no in-app purchases.
Do Prevent GD or Diving Standard have ads?
Neither Prevent GD nor Diving Standard shows ads.
Which is updated more often, Prevent GD or Diving Standard?
Prevent GD ships an update every 2 months, and Diving Standard every 5 days. Most recently, Prevent GD was updated on September 28, 2026 and Diving Standard on September 21, 2026.

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