# おまかせエビングハウスくん vs Simple Study Stamp

The clearest difference is ads: おまかせエビングハウスくん at none against Simple Study Stamp's shown. Simple Study Stamp's advantage is update cadence (every 10 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

おまかせエビングハウスくん ships an update every 2 months, Simple Study Stamp every 10 days. The most recent releases landed on September 27, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | おまかせエビングハウスくん | Simple Study Stamp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 3 MB | 10 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [nanami izumi](https://appshunter.io/developer/1739007991) | [Futoshi Akahoshi](https://appshunter.io/developer/1811302322) |

## What reviewers say

### おまかせエビングハウスくん

[App page](https://appshunter.io/ios/app/id6741511552)

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

**In-app purchases:** none


### Simple Study Stamp

[App page](https://appshunter.io/ios/app/simple-study-stamp/id6757266510)

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

**In-app purchases:** none


## Frequently asked questions

### Is おまかせエビングハウスくん free?

おまかせエビングハウスくん is free to download, with no in-app purchases.

### Is Simple Study Stamp free?

Simple Study Stamp is free to download, with no in-app purchases.

### Do おまかせエビングハウスくん or Simple Study Stamp have ads?

Simple Study Stamp shows ads; おまかせエビングハウスくん does not.

### Which is updated more often, おまかせエビングハウスくん or Simple Study Stamp?

おまかせエビングハウスくん ships an update every 2 months, and Simple Study Stamp every 10 days. Most recently, おまかせエビングハウスくん was updated on September 27, 2026 and Simple Study Stamp on September 30, 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.*