# PureScan vs Memo Keeper

The clearest difference is in-app purchases: PureScan at none against Memo Keeper's 1. Memo Keeper's advantage is update cadence (every 2 days vs every 3 months) and iOS requirement (18.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. Memo Keeper sells 1 one-off in-app purchase. PureScan asks for nothing beyond the download.

PureScan ships an update every 3 months, Memo Keeper every 2 days. The most recent releases landed on October 20, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | PureScan | Memo Keeper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 1 MB | 16 MB |
| Requires iOS | 26.2 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KAYZER ELEKTRONIK TICARET ANONIM SIRKETI](https://appshunter.io/developer/1630391207) | [纯沁 吴](https://appshunter.io/developer/6814033011) |

## What reviewers say

### PureScan

[App page](https://appshunter.io/ios/app/purescan-document-scanner/id6759690387)

**Features:** macOS Compatibility

**In-app purchases:** none


### Memo Keeper

[App page](https://appshunter.io/ios/app/memo-keeper-notes-and-reminders/id6816660078)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 记着呢 Pro | $4.99 | one-time |


## Frequently asked questions

### Is PureScan free?

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

### Is Memo Keeper free?

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

### Do PureScan or Memo Keeper have ads?

Neither PureScan nor Memo Keeper shows ads.

### Which is updated more often, PureScan or Memo Keeper?

PureScan ships an update every 3 months, and Memo Keeper every 2 days. Most recently, PureScan was updated on October 20, 2026 and Memo Keeper on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*