# Biorhythm 365days vs Unit Keeper

The clearest difference is in-app purchases: Unit Keeper at none against Biorhythm 365days's 1. Unit Keeper also leads on ads (none vs shown). Biorhythm 365days's advantage is update cadence (every 2 weeks vs every 6 months) and iOS requirement (15.6 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Biorhythm 365days sells 1 one-off in-app purchase. Unit Keeper asks for nothing beyond the download.

Biorhythm 365days ships an update every 2 weeks, Unit Keeper every 6 months. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Biorhythm 365days | Unit Keeper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Size | 24 MB | 3 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Eleanor Spenceley](https://appshunter.io/developer/1592909450) |

## What reviewers say

### Biorhythm 365days

[App page](https://appshunter.io/ios/app/biorhythm-365days/id1562706194)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Unit Keeper

[App page](https://appshunter.io/ios/app/unit-keeper/id1592909448)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Biorhythm 365days free?

Biorhythm 365days is free to download, with in-app purchases available.

### Is Unit Keeper free?

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

### Do Biorhythm 365days or Unit Keeper have ads?

Biorhythm 365days shows ads; Unit Keeper does not.

### Which is updated more often, Biorhythm 365days or Unit Keeper?

Biorhythm 365days ships an update every 2 weeks, and Unit Keeper every 6 months. Most recently, Biorhythm 365days was updated on October 20, 2026 and Unit Keeper on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*