# みまもりびと vs PrepNote

The clearest difference is in-app purchases: みまもりびと at none against PrepNote's 1. みまもりびと also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.5). On price, update cadence and device support there is nothing between them.

Both are free to download. PrepNote sells 1 one-off in-app purchase. みまもりびと asks for nothing beyond the download.

みまもりびと ships an update every 10 months, PrepNote every 7 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | みまもりびと | PrepNote |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 7 months** |
| Size | 52 MB | 7 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [株式会社grigry](https://appshunter.io/developer/1607263147) | [Eri Tominaga](https://appshunter.io/developer/1528527513) |

## What reviewers say

### みまもりびと

[App page](https://appshunter.io/ios/app/id1607263300)

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

**In-app purchases:** none


### PrepNote

[App page](https://appshunter.io/ios/app/prepnote/id6648762613)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $1.99 | one-time |


## Frequently asked questions

### Is みまもりびと free?

みまもりびと is free to download, with no in-app purchases.

### Is PrepNote free?

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

### Do みまもりびと or PrepNote have ads?

PrepNote shows ads; みまもりびと does not.

### Which is updated more often, みまもりびと or PrepNote?

みまもりびと ships an update every 10 months, and PrepNote every 7 months. Most recently, みまもりびと was updated on October 10, 2026 and PrepNote on October 2, 2026.

---

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