# ATMOS vs Diving Express

The clearest difference is update cadence: ATMOS at every 5 weeks against Diving Express's every 41 months. Diving Express's advantage is iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ATMOS ships an update every 5 weeks, Diving Express every 41 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ATMOS | Diving Express |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.7 (23 ratings)](https://appshunter.io/ios/app/atmos-diving-logbooks/id1448666557/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 7.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 41 months |
| Monetization | Free | — |
| Size | 125 MB | 44 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ATMOS CO., LTD.](https://appshunter.io/developer/1448666556) | [Chileung Chow](https://appshunter.io/developer/1406124350) |

## What reviewers say

### ATMOS

[App page](https://appshunter.io/ios/app/atmos-diving-logbooks/id1448666557)

This app wirelessly syncs dive logs from compatible dive computers. Users can view device information, edit dive log details, and export data in UDDF format. It also integrates with HealthKit to share dive-related health metrics.

**Highlights:** Wireless dive log sync, Device information check, Edit dive log details, Export to UDDF format, HealthKit integration

**In-app purchases:** none


### Diving Express

[App page](https://appshunter.io/ios/app/diving-express/id1498011687)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ATMOS free?

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

### Is Diving Express free?

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

### Do ATMOS or Diving Express have ads?

Neither ATMOS nor Diving Express shows ads.

### Which is updated more often, ATMOS or Diving Express?

ATMOS ships an update every 5 weeks, and Diving Express every 41 months. Most recently, ATMOS was updated on October 24, 2026 and Diving Express on October 18, 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.*