# Percent Error Calculator vs Simple Clock JP

The clearest difference is update cadence: Percent Error Calculator at weekly against Simple Clock JP's every 4 weeks. Percent Error Calculator also leads on iOS requirement (13.0 vs 17.0). On price, ads, 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.

Percent Error Calculator ships an update weekly, Simple Clock JP every 4 weeks. The most recent releases landed on October 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Percent Error Calculator | Simple Clock JP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 weeks |
| Size | 40 MB | 0 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Kantaro Kobayashi](https://appshunter.io/developer/6797092531) |

## What reviewers say

### Percent Error Calculator

[App page](https://appshunter.io/ios/app/percent-error-calculator/id1619680411)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Clock JP

[App page](https://appshunter.io/ios/app/simple-clock-jp/id6805928074)

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

**In-app purchases:** none


## Frequently asked questions

### Is Percent Error Calculator free?

Percent Error Calculator is free to download, with no in-app purchases.

### Is Simple Clock JP free?

Simple Clock JP is free to download, with no in-app purchases.

### Do Percent Error Calculator or Simple Clock JP have ads?

Neither Percent Error Calculator nor Simple Clock JP shows ads.

### Which is updated more often, Percent Error Calculator or Simple Clock JP?

Percent Error Calculator ships an update weekly, and Simple Clock JP every 4 weeks. Most recently, Percent Error Calculator was updated on October 27, 2026 and Simple Clock JP on October 4, 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.*