# Biorhythm Plus vs Simple Clock JP

The clearest difference is ads: Simple Clock JP at none against Biorhythm Plus's shown. Simple Clock JP also leads on update cadence (every 4 weeks vs every 2 months). Biorhythm Plus's advantage is iOS requirement (13.0 vs 17.0). 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.

Biorhythm Plus ships an update every 2 months, Simple Clock JP every 4 weeks. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Biorhythm Plus | Simple Clock JP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 24 MB | 0 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DongHyeon Yun](https://appshunter.io/developer/1189875269) | [Kantaro Kobayashi](https://appshunter.io/developer/6797092531) |

## What reviewers say

### Biorhythm Plus

[App page](https://appshunter.io/ios/app/biorhythm-plus/id1422386816)

**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 Biorhythm Plus free?

Biorhythm Plus 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 Biorhythm Plus or Simple Clock JP have ads?

Biorhythm Plus shows ads; Simple Clock JP does not.

### Which is updated more often, Biorhythm Plus or Simple Clock JP?

Biorhythm Plus ships an update every 2 months, and Simple Clock JP every 4 weeks. Most recently, Biorhythm Plus was updated on October 2, 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.*