Subsurface vs iScubaSites
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Mobile dive log management
- Edit dive data
- Download from Bluetooth LE dive computers
- Optional cloud synchronization
- Open-source and free
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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.
iScubaSites
Discover scuba diving locations globally with this user-friendly app. Simply search a region to find available dive sites and access detailed information when provided. Explore the underwater world with ease.
- Worldwide diving site information
- Location-based search
- Detailed dive site information
- Simple and intuitive interface
- Explore underwater locations
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This app is designed to help divers to find information about available diving sites worldwide. iScubaSites is very simple to use, just search for a location and the app will show you the available scuba diving sites in the area. Selecting a diving site, will show the name and additional information whenever available.
Screenshots
Verdict
Subsurface and iScubaSites both sit at 4.5 stars, but that hides the real split: 80% of iScubaSites's written reviews are positive against 63% of Subsurface's. Subsurface's advantage is ratings volume (48 vs 8) and iOS requirement (17 vs 26.0). On price, rating, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.5 for Subsurface against 4.4 for iScubaSites. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 63% of Subsurface's written reviews are positive against 80% of iScubaSites's.
Subsurface ships an update every 2 months, iScubaSites every 6 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Subsurface | iScubaSites |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (48 ratings) — better | 4.4 (8 ratings) |
| Positive reviews | 63.3% of reviews | 80.0% of reviews — better |
| Number of ratings | 48 — better | 8 |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17 — better | 26.0 |
| Further details — not scored | ||
| Size | 52 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Dirk Hohndel | Arie Guttman |
Customer experience
Subsurface
iScubaSites
In-app purchases
Subsurface
No in-app purchases
iScubaSites
No in-app purchases
