# HSE Observation vs Atomic Notes

The clearest difference is in-app purchases: HSE Observation at none against Atomic Notes's 2. HSE Observation also leads on iOS requirement (7.0 vs 13.0). Atomic Notes's advantage is update cadence (monthly vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. Atomic Notes sells 2 in-app purchases, starting at $3.99 per month. HSE Observation asks for nothing beyond the download.

HSE Observation ships an update every 21 months, Atomic Notes monthly. The most recent releases landed on September 27, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | HSE Observation | Atomic Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Monthly** |
| Size | 10 MB | 77 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [World Web I.T Solutions L.L.C](https://appshunter.io/developer/904694123) | [Brandon Guigo](https://appshunter.io/developer/1772643694) |

## What reviewers say

### HSE Observation

[App page](https://appshunter.io/ios/app/hse-observation/id1095130281)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atomic Notes

[App page](https://appshunter.io/ios/app/atomic-notes/id6747767868)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Monthly | $3.99 | per month |
| Cloud Yearly | $34.99 | per year |


## Frequently asked questions

### Is HSE Observation free?

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

### Is Atomic Notes free?

Atomic Notes is free to download, with in-app purchases available.

### Do HSE Observation or Atomic Notes have ads?

Neither HSE Observation nor Atomic Notes shows ads.

### Which is updated more often, HSE Observation or Atomic Notes?

HSE Observation ships an update every 21 months, and Atomic Notes monthly. Most recently, HSE Observation was updated on September 27, 2026 and Atomic Notes on October 5, 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.*