# BP 4DAT vs DiaryQ

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

Both are free to download. BP 4DAT sells 2 in-app purchases, starting at $2.99 per month. DiaryQ asks for nothing beyond the download.

BP 4DAT ships an update every 2 months, DiaryQ every 3 days. The most recent releases landed on August 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | BP 4DAT | DiaryQ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 3 MB | 31 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [4DAT LLC](https://appshunter.io/developer/1649051364) | [Takeaki Hashimoto](https://appshunter.io/developer/6775720582) |

## What reviewers say

### BP 4DAT

[App page](https://appshunter.io/ios/app/bp-4dat/id6762622861)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $29.99 | per year |


### DiaryQ

[App page](https://appshunter.io/ios/app/diaryq/id6799314094)

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

**In-app purchases:** none


## Frequently asked questions

### Is BP 4DAT free?

BP 4DAT is free to download, with in-app purchases available.

### Is DiaryQ free?

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

### Do BP 4DAT or DiaryQ have ads?

Neither BP 4DAT nor DiaryQ shows ads.

### Which is updated more often, BP 4DAT or DiaryQ?

BP 4DAT ships an update every 2 months, and DiaryQ every 3 days. Most recently, BP 4DAT was updated on August 6, 2026 and DiaryQ on October 12, 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.*