# ERAI! vs じぶんちょきん

The clearest difference is ads: じぶんちょきん at none against ERAI!'s shown. じぶんちょきん also leads on iOS requirement (12.4 vs 15.0). ERAI!'s advantage is update cadence (weekly vs every 5 weeks). On price, 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.

ERAI! ships an update weekly, じぶんちょきん every 5 weeks. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | ERAI! | じぶんちょきん |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 weeks |
| Size | 18 MB | 29 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kosuke Shimada](https://appshunter.io/developer/1529796493) | [Takaaki Shuto](https://appshunter.io/developer/1653547830) |

## What reviewers say

### ERAI!

[App page](https://appshunter.io/ios/app/erai/id1529796491)

**Features:** macOS Compatibility

**In-app purchases:** none


### じぶんちょきん

[App page](https://appshunter.io/ios/app/id6444278352)

**In-app purchases:** none


## Frequently asked questions

### Is ERAI! free?

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

### Is じぶんちょきん free?

じぶんちょきん is free to download, with no in-app purchases.

### Do ERAI! or じぶんちょきん have ads?

ERAI! shows ads; じぶんちょきん does not.

### Which is updated more often, ERAI! or じぶんちょきん?

ERAI! ships an update weekly, and じぶんちょきん every 5 weeks. Most recently, ERAI! was updated on September 8, 2026 and じぶんちょきん on September 20, 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.*