# atmospherePro vs OneCrypt

The clearest difference is in-app purchases: atmospherePro at none against OneCrypt's 3. atmospherePro also leads on ads (none vs shown) and device support (4 vs 2). OneCrypt's advantage is update cadence (every 9 days vs every 2 months). On price and iOS requirement there is nothing between them.

Both are free to download. OneCrypt sells 3 in-app purchases, starting at $0.99 per year. atmospherePro asks for nothing beyond the download.

atmospherePro ships an update every 2 months, OneCrypt every 9 days. The most recent releases landed on September 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | atmospherePro | OneCrypt |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 38 MB | 31 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Atsign](https://appshunter.io/developer/1516551087) | [国材 苏](https://appshunter.io/developer/1227214050) |

## What reviewers say

### atmospherePro

[App page](https://appshunter.io/ios/app/atmospherepro/id1550936444)

**In-app purchases:** none


### OneCrypt

[App page](https://appshunter.io/ios/app/onecrypt-encrypt-files/id6459055606)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Pro | $0.99 | per year |
| Monthly Pro | $0.99 | per month |
| Lifetime Pro | $2.99 | one-time |


## Frequently asked questions

### Is atmospherePro free?

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

### Is OneCrypt free?

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

### Do atmospherePro or OneCrypt have ads?

OneCrypt shows ads; atmospherePro does not.

### Which is updated more often, atmospherePro or OneCrypt?

atmospherePro ships an update every 2 months, and OneCrypt every 9 days. Most recently, atmospherePro was updated on September 19, 2026 and OneCrypt on September 17, 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.*