# The Biorhythm vs KalApp

The clearest difference is in-app purchases: KalApp at none against The Biorhythm's 1. KalApp also leads on ads (none vs shown). The Biorhythm's advantage is iOS requirement (15.0 vs 26.5). On price and device support there is nothing between them.

Both are free to download. The Biorhythm sells 1 one-off in-app purchase. KalApp asks for nothing beyond the download.

## The numbers

| Metric | The Biorhythm | KalApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (65 ratings)](https://appshunter.io/ios/app/the-biorhythm/id689929460/reviews)** | — |
| Number of ratings | **65** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 10 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Meanterm Inc.](https://appshunter.io/developer/403684796) | [Khalid Husseini](https://appshunter.io/developer/6800308063) |

## What reviewers say

### The Biorhythm

[App page](https://appshunter.io/ios/app/the-biorhythm/id689929460)

This app provides a straightforward view of original biorhythm curves for multiple individuals. It focuses solely on displaying these curves without any extraneous information, offering a clean and easy-to-understand experience.

**Highlights:** Original biorhythm curves, Easy to read display, Supports multiple people, Focused interface, No extra information

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $1.99 | one-time |


### KalApp

[App page](https://appshunter.io/ios/app/kalapp-calorie-tracker/id6800308061)

**In-app purchases:** none


## Frequently asked questions

### Is The Biorhythm free?

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

### Is KalApp free?

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

### Do The Biorhythm or KalApp have ads?

The Biorhythm shows ads; KalApp does not.

---

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