# AWU2UDDF vs Submersion Dive Log

The clearest difference is review sentiment: AWU2UDDF at 100% against Submersion Dive Log's 67%. AWU2UDDF also leads on rating (5.0 vs 4.6). Submersion Dive Log's advantage is update cadence (every 4 days vs every 14 months) and ratings volume (12 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AWU2UDDF holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Submersion Dive Log has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of AWU2UDDF's written reviews are positive against 67% of Submersion Dive Log's.

AWU2UDDF ships an update every 14 months, Submersion Dive Log every 4 days. The most recent releases landed on September 20, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | AWU2UDDF | Submersion Dive Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/awu2uddf/id1661616210/reviews)** | [4.6 (12 ratings)](https://appshunter.io/ios/app/submersion-dive-log/id6757456915/reviews) |
| Number of ratings | 2 | **12** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 1 MB | 155 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Douglas Junkins](https://appshunter.io/developer/1661616212) | [Eric Griffin](https://appshunter.io/developer/1867101718) |

## What reviewers say

### AWU2UDDF

[App page](https://appshunter.io/ios/app/awu2uddf/id1661616210)

Export underwater depth and temperature data from your Apple Watch to a standard UDDF XML file. This file can then be imported into popular diving log software for comprehensive record-keeping. It seamlessly integrates with the Health App and HealthKit.

**Highlights:** Export underwater depth and temperature data, Standard Universal Dive Data Format (UDDF) XML output, Import into Macdive or Subsurface, Integrates with Health App and HealthKit

**In-app purchases:** none


### Submersion Dive Log

[App page](https://appshunter.io/ios/app/submersion-dive-log/id6757456915)

This app is a comprehensive, open-source dive log for recreational and technical divers. It allows users to track unlimited dives, manage gear, analyze trends, and export data. The app offers dive computer integration, advanced profile analysis, and detailed logging for various dive types and conditions.

**Highlights:** Log unlimited dives with detailed conditions, Dive computer integration, Advanced profile analysis, Technical diving support, Gear and equipment management, Dive site database with maps, Marine life tracking

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AWU2UDDF free?

AWU2UDDF is free to download, with no in-app purchases.

### Is Submersion Dive Log free?

Submersion Dive Log is free to download, with no in-app purchases.

### Which has better reviews, AWU2UDDF or Submersion Dive Log?

AWU2UDDF is rated higher. AWU2UDDF averages 5.0 out of 5 from 2 ratings, while Submersion Dive Log averages 4.6 from 12 ratings.

### Do AWU2UDDF or Submersion Dive Log have ads?

Neither AWU2UDDF nor Submersion Dive Log shows ads.

### Which is updated more often, AWU2UDDF or Submersion Dive Log?

AWU2UDDF ships an update every 14 months, and Submersion Dive Log every 4 days. Most recently, AWU2UDDF was updated on September 20, 2026 and Submersion Dive Log on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*