# OSTConf vs Submersion Dive Log

The clearest difference is review sentiment: Submersion Dive Log at 60% against OSTConf's 25%. Submersion Dive Log also leads on update cadence (every 4 days vs every 5 months). 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.

OSTConf ships an update every 5 months, Submersion Dive Log every 4 days. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | OSTConf | Submersion Dive Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (10 ratings)](https://appshunter.io/ios/app/submersion-dive-log/id6757456915/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | 25.0% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 3 MB | 155 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Kai-Uwe Sattler](https://appshunter.io/developer/500229044) | [Eric Griffin](https://appshunter.io/developer/1867101718) |

## What reviewers say

### OSTConf

[App page](https://appshunter.io/ios/app/ostconf/id1404182943)

Configure your dive computer settings and parameters wirelessly. Update date, time, custom text, gas mixes, and deco settings. Compatible with recent Bluetooth-enabled dive computers.

**Highlights:** Read and modify settings, Update date and time, Set custom text, Configure gas mixes, Set deco parameters, Upgrade firmware, Retrieve device information

**Features:** macOS Compatibility

**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 OSTConf free?

OSTConf 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.

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

Neither OSTConf nor Submersion Dive Log shows ads.

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

OSTConf ships an update every 5 months, and Submersion Dive Log every 4 days. Most recently, OSTConf was updated on September 19, 2026 and Submersion Dive Log on September 22, 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.*