# biorhythm cycles vs MutLab

The clearest difference is in-app purchases: MutLab at none against biorhythm cycles's 1. MutLab also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. biorhythm cycles sells 1 one-off in-app purchase. MutLab asks for nothing beyond the download.

biorhythm cycles ships an update every 5 months, MutLab every 2 months. The most recent releases landed on October 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | biorhythm cycles | MutLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (220 ratings)](https://appshunter.io/ios/app/biorhythm-cycles/id879917580/reviews)** | — |
| Number of ratings | **220** | — |
| Positive reviews | 40.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 60 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Petro Riznyk](https://appshunter.io/developer/879917583) | [Mutlab](https://appshunter.io/developer/1363984051) |

## What reviewers say

### biorhythm cycles

[App page](https://appshunter.io/ios/app/biorhythm-cycles/id879917580)

Calculate and track your daily physical, emotional, and intellectual cycles. Understand how these periodic changes affect your energy, mood, and creativity. Compare your feelings to your biorhythm values and discover potential daily patterns.

**Highlights:** Calculate physical, emotional, and intellectual biorhythms, Compare daily biorhythm values to personal feelings, Utilize classical and improved biorhythm models, View generalized biorhythm graph, Track cycles from birth date

**Features:** macOS Compatibility

**In-app purchases (1)**

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


### MutLab

[App page](https://appshunter.io/ios/app/mutlab/id1576343740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is biorhythm cycles free?

biorhythm cycles is free to download, with in-app purchases available.

### Is MutLab free?

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

### Do biorhythm cycles or MutLab have ads?

Neither biorhythm cycles nor MutLab shows ads.

### Which is updated more often, biorhythm cycles or MutLab?

biorhythm cycles ships an update every 5 months, and MutLab every 2 months. Most recently, biorhythm cycles was updated on October 1, 2026 and MutLab on September 21, 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.*