Comparison

Scuba Gas Manager vs Subsurface

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

Head to head

Your dive list on the go

Free

⚽ Sports

★ 4.548 ratingsView app →

About

Scuba Gas Manager

Features

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Simple SCUBA gas manager app to calculate SAC and RMV rates and calculate required gas from RMV. Supports both imperial and metric calculations.

About

Subsurface

This application allows divers to manage their dive logs on their mobile devices. It supports editing dive data and downloading new information from compatible dive computers. Optional cloud synchronization is available for seamless data transfer with desktop versions.

Highlights

Mobile dive log management
Edit dive data
Download from Bluetooth LE dive computers
Optional cloud synchronization
Open-source and free

Read full description

Subsurface-mobile is an iOS dive log application based on Subsurface, the best free open source dive log application available on Windows, Mac and Linux. Subsurface-mobile allows you to access your dive log on your tablet or phone, edit the data and even download new dive information from many Bluetooth LE enabled dive computers. Using a free Subsurface Cloud Storage account you can synchronize your dive data with the Subsurface desktop application (while significantly increasing the usefulness, the cloud account is not required to use Subsurface-mobile). To get support from the developers, please use the in-app menu entry "Ask for support" Please check out the Subsurface-mobile user manual: https://subsurface-divelog.org/documentation/subsurface-mobile-v3-user-manual (also available from within the app) Subsurface-mobile is free and open source. No ads, no commercial anything. And it comes with free cloud storage (if you decide to use that - it's optional). Your data aren't used for anything, nothing gets monetized.

Screenshots

Scuba Gas Manager3 screens

Subsurface4 screens

Verdict

The call

The clearest difference is iOS requirement: Scuba Gas Manager at 8.0 against Subsurface's 17. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Scuba Gas Manager ships an update every 4 months, Subsurface every 2 months. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

Scorecard1 real difference · 9 level

Scuba Gas Manager versus Subsurface: the parameters behind the verdict, then further details
Parameter	Scuba Gas Manager	Subsurface
Price	Free	Free
Rating	—	4.5 (48 ratings) — better
Positive reviews	—	63.3% of reviews
Number of ratings	—	48 — better
Update frequency	Every 4 months	Every 2 months — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	8.0 — better	17
Further details — not scored
Size	2 MB	52 MB
Age rating	12+	4+
Developer	AndyDragon Software	Dirk Hohndel

In-app purchases

None

Scuba Gas Manager

No in-app purchases

None

Subsurface

No in-app purchases

Questions

Is Scuba Gas Manager free?

Scuba Gas Manager is free to download, with no in-app purchases.

Is Subsurface free?

Subsurface is free to download, with no in-app purchases.

Do Scuba Gas Manager or Subsurface have ads?

Neither Scuba Gas Manager nor Subsurface shows ads.

Which is updated more often, Scuba Gas Manager or Subsurface?

Scuba Gas Manager ships an update every 4 months, and Subsurface every 2 months. Most recently, Scuba Gas Manager was updated on October 10, 2026 and Subsurface on October 14, 2026.