# KeepRabbit vs Keisan Memo

The clearest difference is in-app purchases: KeepRabbit at none against Keisan Memo's 1. Keisan Memo's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

KeepRabbit ships an update every 3 weeks, Keisan Memo weekly. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | KeepRabbit | Keisan Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 61 MB | 5 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [SHAO PING CHU](https://appshunter.io/developer/1865340378) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### KeepRabbit

[App page](https://appshunter.io/ios/app/keeprabbit-notes-bookmarks/id6763484178)

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

**In-app purchases:** none


### Keisan Memo

[App page](https://appshunter.io/ios/app/keisan-memo-calc-notepad/id6791201696)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Lifetime) | $0.99 | one-time |


## Frequently asked questions

### Is KeepRabbit free?

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

### Is Keisan Memo free?

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

### Do KeepRabbit or Keisan Memo have ads?

Both KeepRabbit and Keisan Memo show ads.

### Which is updated more often, KeepRabbit or Keisan Memo?

KeepRabbit ships an update every 3 weeks, and Keisan Memo weekly. Most recently, KeepRabbit was updated on October 3, 2026 and Keisan Memo on October 4, 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.*