Comparison

Subsurface vs Diving Calculator

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

Head to head
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.

About

Diving Calculator

Read full description

Diving Calculator is an app designed for divers of all levels who seek to simplify the necessary calculations for a safe and efficient dive. The app includes several tools that allow users to calculate air consumption, determine the maximum dive depth without needing to make decompression stops, and ensure they have all the necessary equipment for their underwater adventure. On the main screen, the Diving Calculator allows users to access three main features: Dive Time Calculator: This tool allows the diver to input data such as air tank capacity, initial pressure, and depth to calculate how many liters of air will be consumed during the dive and how many bars the tank should have before diving. Decompression Stop Calculator: Based on the depth and dive time, the app simulates the behavior of a dive computer, providing the user with the necessary information to know how long they can stay at a given depth without making decompression stops. Equipment Checklist: The app includes a complete checklist with all the essential gear for a safe dive. From the regulator to the wetsuit, users can ensure they don't forget any equipment before getting into the water. The design of the Diving Calculator is visually appealing, using blue tones that evoke the underwater environment. The interface is intuitive, allowing both novice and experienced divers to use the app without complications. This tool is an indispensable companion for planning safe dives, allowing users to focus on enjoying their underwater experience, knowing they have performed all the key calculations accurately. Diving Calculator is an essential tool for any diving enthusiast who wants to ensure their safety underwater, optimizing air consumption and minimizing risks during the dive.

Screenshots

Subsurface4 screens
Diving Calculator4 screens

Verdict

The call

The clearest difference is update cadence: Diving Calculator at weekly against Subsurface's every 2 months. Diving Calculator also leads on iOS requirement (12.0 vs 17). On price, ads, in-app purchases and device support 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

Subsurface ships an update every 2 months, Diving Calculator weekly. Both last shipped on October 6, 2026.

Scorecard2 real differences · 8 level
Subsurface versus Diving Calculator: the parameters behind the verdict, then further details
ParameterSubsurfaceDiving Calculator
PriceFreeFree
Rating4.5 (48 ratings) — better—
Positive reviews63.3% of reviews—
Number of ratings48 — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS1712.0 — better
Further details — not scored
Size52 MB33 MB
Age rating4+4+
DeveloperDirk HohndelAlberto Segovia

In-app purchases

None

Subsurface

No in-app purchases

None

Diving Calculator

No in-app purchases

Questions

Is Subsurface free?
Subsurface is free to download, with no in-app purchases.
Is Diving Calculator free?
Diving Calculator is free to download, with no in-app purchases.
Do Subsurface or Diving Calculator have ads?
Neither Subsurface nor Diving Calculator shows ads.
Which is updated more often, Subsurface or Diving Calculator?
Subsurface ships an update every 2 months, and Diving Calculator weekly. Most recently, Subsurface was updated on October 6, 2026 and Diving Calculator on October 6, 2026.

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