Subsurface vs DiveSync
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.
DiveSync
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Introduction: DiveSync is a free mobile app that connects your mobile device to your dive computer to manage and organize your precious dive data. DiveSync enables users to view, edit, and analyze previous dives, add locations and photos, and easily update the dive computer firmware. DiveSync is compatible with select dive computers from Cressi, Genesis, OceanPro, Sherwood, and XS Scuba. Key Features: Dive Log: Download, view, and manage your dive logs from your dive computer to your mobile device. Automatically download dives or manually add them to create an extensive logbook. Data: Analyze data such as dive time, max depth, tissue loading, ascent rates, and much more. Dive profiles can be viewed in both graphical and tabular formats. Planning: Set alerts for time and depth, set gas mixes, and manage your dive profile. Customization: Add memos, dive spots, dive photos, and observations. Dive Spots: Accurately add dive locations via Apple Maps. DC Control: Set device settings for your dive computer and perform firmware updates. Bluetooth: Transfer dive data from your dive computer using Bluetooth 5.0 ensuring fast download and upload times. Compatibility: Currently supports Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+ and Sherwood Wisdom 5 Supported Mobile Platforms: iOS. Summary: DiveSync is a free iOS dive log app that allows you to access and download your dive logs using a streamlined interface and user experience. Automatically download new dives or manually input information with compatible Bluetooth LE enabled dive computers from Cressi, XS Scuba, and Oceanpro. (Currently compatible models include the Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+, and Sherwood Wisdom 5) To get support from the developers, please use the in-app menu to “Send to Tech Support” and reach out to support@divesync.io. Additional troubleshooting and FAQs may be found directly at the DiveSync website. (www.divesync.io) DiveSync is free and all data is stored locally on your device. Your dive data is not used for any commercial purpose and is not monetized.
Screenshots
Verdict
The clearest difference is update cadence: DiveSync at every 2 weeks against Subsurface's every 2 months. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Subsurface ships an update every 2 months, DiveSync every 2 weeks. The most recent releases landed on September 27, 2026 and September 20, 2026 respectively.
| Parameter | Subsurface | DiveSync |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (48 ratings) — better | — |
| Positive reviews | 63.3% of reviews | — |
| Number of ratings | 48 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17 | 16.5 — better |
| Further details — not scored | ||
| Size | 52 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Dirk Hohndel | Proasia Design Co. Ltd |
In-app purchases
Subsurface
No in-app purchases
DiveSync
No in-app purchases








