# memoChica vs Idea x Knock

The clearest difference is update cadence: Idea x Knock at weekly against memoChica's every 3 weeks. Idea x Knock also leads on iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

memoChica ships an update every 3 weeks, Idea x Knock weekly. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | memoChica | Idea x Knock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 82.4% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 23 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Shinichiro Yamamoto](https://appshunter.io/developer/1118743580) | [Kosuke Shimada](https://appshunter.io/developer/1529796493) |

## What reviewers say

### memoChica

[App page](https://appshunter.io/ios/app/memochica-notes-for-ideas/id1118743581)

This app helps you rediscover your past thoughts and ideas. It randomly displays your saved memos, allowing you to revisit forgotten notes and gain new insights. Use it for brainstorming, journaling, or even as a fun way to recall information.

**Highlights:** Random memo display, View full memo text in list, Search memos by text, Share memos to other apps, "Furikaeru" retrospective function

**Features:** macOS Compatibility

**In-app purchases:** none


### Idea x Knock

[App page](https://appshunter.io/ios/app/idea-x-knock/id1613942064)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is memoChica free?

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

### Is Idea x Knock free?

Idea x Knock is free to download, with no in-app purchases.

### Do memoChica or Idea x Knock have ads?

Both memoChica and Idea x Knock show ads.

### Which is updated more often, memoChica or Idea x Knock?

memoChica ships an update every 3 weeks, and Idea x Knock weekly. Most recently, memoChica was updated on November 2, 2026 and Idea x Knock on November 7, 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.*