# HiMemo2 vs Mugen AI

The clearest difference is ads: HiMemo2 at none against Mugen AI's shown. HiMemo2 also leads on monetization model (free vs ad-supported) and device support (4 vs 2). Mugen AI's advantage is iOS requirement (18.0 vs 26.0). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

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

HiMemo2 ships an update monthly, Mugen AI every 3 weeks. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | HiMemo2 | Mugen AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 5 MB | 10 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Kawai](https://appshunter.io/developer/1286509355) | [Koichiro Kamada](https://appshunter.io/developer/476534292) |

## What reviewers say

### HiMemo2

[App page](https://appshunter.io/ios/app/himemo2/id1614965391)

Organize information with a simple, hierarchical structure. Easily add, edit, and view data in a tree format, and export it to other apps. Syncs across Apple devices and is accessible on Apple Watch.

**Highlights:** Hierarchical data entry and management, Cross-device sync (iPhone, iPad, Mac), Apple Watch browsing, Enhanced search functionality, Simple and intuitive UI, Plain text and HTML export

**In-app purchases:** none


### Mugen AI

[App page](https://appshunter.io/ios/app/mugen-ai/id6740717908)

This AI assistant app makes advanced artificial intelligence accessible to everyone with a simple, intuitive interface. It offers over 10 practical AI functions, including translation, summarization, and idea generation, requiring no prior technical knowledge.

**Highlights:** Intuitive AI interface, Translation in multiple languages, Text summarization, Grammar and style correction, Idea generation, Question answering

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

**In-app purchases:** none


## Frequently asked questions

### Is HiMemo2 free?

HiMemo2 is free to download, with no in-app purchases.

### Is Mugen AI free?

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

### Do HiMemo2 or Mugen AI have ads?

Mugen AI shows ads; HiMemo2 does not.

### Which is updated more often, HiMemo2 or Mugen AI?

HiMemo2 ships an update monthly, and Mugen AI every 3 weeks. Most recently, HiMemo2 was updated on October 15, 2026 and Mugen AI 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.*