Flaska vs AWU Divelog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flaska
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A scuba tank calculator utility app -- calculates rock bottom air requirements, gas time, and transfills for various tank sizes.
AWU Divelog
This app reads dive data from your Apple Watch Ultra, displaying and organizing your dives with detailed statistics and graphical representations. Export your dive logs in a universal format for use with other dive software.
- Reads dive data from Apple Watch Ultra
- Lists dives with duration, depth, and temperature
- Sorts and groups dives by various metrics
- Graphical display of depth and temperature
- Exports dives in UDDF XML format
- Provides overall dive statistics
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Apple Watch Ultra (AWU) Divelog reads your recorded dive data from the Apple Watch Ultra and displays your dives. For this purpose, AWU Divelog is integrated with the Health App and the HealthKit framework and accesses the depth and temperature data stored on the phone. Your dives are listed along with the most important data, such as duration, depth and temperature, sorted by time. You may sort and group your dives by different metrics. Detailed data can be displayed for each dive. In the detail view depth and/or temperature are graphically displayed and can be shared (e.g. by AirDrop). In the detail view it is possible to swipe through the dives. In addition, overall statistics of all or selected dives are automatically displayed in the upper area of the list view. After a dive, the data is read from the Apple Watch Ultra and added to AWU Divelog. Manual updating of the list is also possible. Short surface breaks during the dive are detected and are not interpreted as separate dives. Dives can be exported as Universal Dive Data Format (UDDF) XML file (e.g. by AirDrop). The UDDF file can be imported into common dive software (e.g. Macdive and Subsurface). AWU Divelog is available in English and German. It will use your iPhone's regional units of measurement for depth and temperature (metric vs imperal). Hard Facts: - Reading recorded dive data from your Apple Watch Ultra. - List your read dives immediately after diving on your iPhone. - Statistics about your dives. - Graphical display including export for dive depth and/or water temperature. - Select individual dives. - Sort and group your dives. - Share the chart as PNG/JPG (e.g. via social media). - UDDF export of the dives
Screenshots
Verdict
The clearest difference is price: Flaska at Free against AWU Divelog's $3.99. Flaska also leads on iOS requirement (13.0 vs 17.0). On update cadence, 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
Flaska is free to download; AWU Divelog costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.
| Parameter | Flaska | AWU Divelog |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Kastelo AB | Stefan Taber |
In-app purchases
Flaska
No in-app purchases
AWU Divelog
No in-app purchases
