# ERAI! vs BuildTimer

The clearest difference is ads: BuildTimer at none against ERAI!'s shown. ERAI!'s advantage is update cadence (weekly vs fortnightly). 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.

ERAI! ships an update weekly, BuildTimer fortnightly. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ERAI! | BuildTimer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Size | 18 MB | 40 MB |
| Requires iOS | **15.0** | 16.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kosuke Shimada](https://appshunter.io/developer/1529796493) | [hashimoto ryouya](https://appshunter.io/developer/1684907824) |

## What reviewers say

### ERAI!

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

**Features:** macOS Compatibility

**In-app purchases:** none


### BuildTimer

[App page](https://appshunter.io/ios/app/buildtimer/id6448892333)

**In-app purchases:** none


## Frequently asked questions

### Is ERAI! free?

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

### Is BuildTimer free?

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

### Do ERAI! or BuildTimer have ads?

ERAI! shows ads; BuildTimer does not.

### Which is updated more often, ERAI! or BuildTimer?

ERAI! ships an update weekly, and BuildTimer fortnightly. Most recently, ERAI! was updated on September 30, 2026 and BuildTimer on October 6, 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.*