Comparison

AWU Divelog vs Simple Nitrox

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Simple Nitrox

Features
Read full description

Simple Nitrox provides an easy to use and very visible calculation of Maximum Operating Depth for scuba diving. The most appropriate nitrox mix can also be calculated for a planned depth. Widgets can be added to the Home Screen for up to 5 tanks for easy access to the values for previously analysed tanks and the application. Supports metric and imperial, and o2 up to 99%.

Screenshots

AWU Divelog4 screens
Simple Nitrox3 screens

Verdict

The call

The clearest difference is price: Simple Nitrox at Free against AWU Divelog's $3.99. AWU Divelog's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 29 months). On ads, device support and iOS requirement 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

Simple Nitrox is free to download; AWU Divelog costs $3.99 up front. Simple Nitrox sells 1 one-off in-app purchase. AWU Divelog asks for nothing beyond the download.

UpkeepUpdate frequency

AWU Divelog ships an update every 2 months, Simple Nitrox every 29 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
AWU Divelog versus Simple Nitrox: the parameters behind the verdict, then further details
ParameterAWU DivelogSimple Nitrox
Price$3.99Free — better
Rating3.0 (2 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 months — betterEvery 29 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhoneiPhone
Requires iOS17.016.0 — better
Further details — not scored
Size1 MB2 MB
Age rating4+4+
DeveloperStefan TaberSimon Chivers

In-app purchases

None

AWU Divelog

No in-app purchases

1 purchases

Simple Nitrox

One-time1
  • Simple Nitrox Full Access$0.99

Questions

Is AWU Divelog free?
AWU Divelog costs $3.99, with no in-app purchases.
Is Simple Nitrox free?
Simple Nitrox is free to download, with in-app purchases available.
Do AWU Divelog or Simple Nitrox have ads?
Neither AWU Divelog nor Simple Nitrox shows ads.
Which is updated more often, AWU Divelog or Simple Nitrox?
AWU Divelog ships an update every 2 months, and Simple Nitrox every 29 months. Most recently, AWU Divelog was updated on November 3, 2026 and Simple Nitrox on November 7, 2026.

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