Subsurface vs ATMOS
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.
ATMOS
This app wirelessly syncs dive logs from compatible dive computers. Users can view device information, edit dive log details, and export data in UDDF format. It also integrates with HealthKit to share dive-related health metrics.
- Wireless dive log sync
- Device information check
- Edit dive log details
- Export to UDDF format
- HealthKit integration
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ATMOS App is the best companion of Mission One and Mission2, Mission3 dive computer. You can use ATMOS App to : ● Wirelessly sync your device's divelogs. ● Check device information. ● Edit divelog information. ● Export divelog to UDDF format. ATMOS use HealthKit to export your Mission2 health data (Steps, Calories, Sleep, Heart rate) into the Health app. Official website : https://www.atmos.app FaceBook fan page: https://www.facebook.com/atmosocean/ Follow us on Instagram : @atmos_ocean
Screenshots
Verdict
The clearest difference is review sentiment: Subsurface at 63% against ATMOS's 8%. Subsurface also leads on rating (4.5 vs 1.7). ATMOS's advantage is iOS requirement (14.0 vs 17). On price, ratings volume, 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.
Subsurface holds the better App Store score, 4.5 against 1.7. Both are backed by a comparable volume of ratings — 48 and 23 respectively. Written reviews point the same way: 63% of Subsurface's written reviews are positive against 8% of ATMOS's.
Subsurface ships an update every 2 months, ATMOS every 5 weeks. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.
| Parameter | Subsurface | ATMOS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (48 ratings) — better | 1.7 (23 ratings) |
| Positive reviews | 63.3% of reviews — better | 7.7% of reviews |
| Number of ratings | 48 — better | 23 |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17 | 14.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 125 MB |
| Age rating | 4+ | 4+ |
| Developer | Dirk Hohndel | ATMOS CO., LTD. |
Customer experience
Subsurface
ATMOS
In-app purchases
Subsurface
No in-app purchases
ATMOS
No in-app purchases
