# AOK vs 2sBrain

The clearest difference is in-app purchases: AOK at none against 2sBrain's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 2sBrain sells 3 in-app purchases, starting at $3.99 per month. AOK asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | AOK | 2sBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (34 ratings)](https://appshunter.io/ios/app/aok-adyton-operations-kit/id1519530490/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free | — |
| Size | 110 MB | 66 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adyton PBC](https://appshunter.io/developer/1462197332) | [Nguyen Nhu Vuong](https://appshunter.io/developer/1486864462) |

## What reviewers say

### AOK

[App page](https://appshunter.io/ios/app/aok-adyton-operations-kit/id1519530490)

This suite of tools helps organizations manage personnel, files, and equipment securely. It digitizes hand receipts, streamlines accountability checks, and enables dynamic scheduling for distributed teams. Designed to meet stringent federal information requirements with full data encryption.

**Highlights:** Secure personnel and file management, Digitized hand receipts, Real-time accountability checks, Dynamic team scheduling, Encrypted data at rest and in transit, FIPS 140-2 cryptography

**Features:** Vision Pro support

**In-app purchases:** none


### 2sBrain

[App page](https://appshunter.io/ios/app/2sbrainai-pdf-document-reader/id6768344372)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Monthly | $3.99 | per month |
| VIP Yearly | $19.99 | per year |
| VIP Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is AOK free?

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

### Is 2sBrain free?

2sBrain is free to download, with in-app purchases available.

### Do AOK or 2sBrain have ads?

Neither AOK nor 2sBrain shows ads.

### Which is updated more often, AOK or 2sBrain?

AOK ships an update weekly, and 2sBrain weekly. Most recently, AOK was updated on October 4, 2026 and 2sBrain 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.*