# Biorhythm vs ARLS

The clearest difference is ads: ARLS at none against Biorhythm's shown. ARLS also leads on update cadence (every 9 days vs monthly) and iOS requirement (15.1 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 ships an update monthly, ARLS every 9 days. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Biorhythm | ARLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3.9K ratings)](https://appshunter.io/ios/app/biorhythm-365/id570628630/reviews)** | — |
| Number of ratings | **3.9K** | — |
| Positive reviews | 84.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 39 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 9+ |
| Developer | [Jeonghwan Kim](https://appshunter.io/developer/429842114) | [sarkaft selewani](https://appshunter.io/developer/1004749279) |

## What reviewers say

### Biorhythm

[App page](https://appshunter.io/ios/app/biorhythm-365/id570628630)

Understand your daily physical, emotional, and intellectual cycles. This app provides insights into your biorhythms, helping you make informed decisions and avoid potential risks by analyzing your daily, weekly, and monthly patterns.

**Highlights:** Daily biorhythm tracking, Physical, emotional, and intellectual cycles, Graph and value display, Future biorhythm preview, Share biorhythm data, Accurate algorithmic calculations

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and understand
- 🚀 Accurate and informative
- 💡 Helpful for planning and self-awareness
- 🔍 Useful for tracking personal rhythms
- 📈 Tracks biorhythms over time

**What reviewers complain about**

- 🔒 Limited to one user profile
- 🔍 Lacks ability to compare multiple profiles
- 📝 Difficult to change birth date once entered
- 💰 Ads prompt for paid version
- 🔍 Lacking detailed explanations and instructions

**Reported bugs**

- Birthday icon does not always function as expected
- App freezes or crashes on some devices

**Requested features**

- Add ability to track multiple user profiles
- Implement date/month scrolling for easier navigation
- Provide more detailed information and explanations
- Include option to remove ads without paid upgrade


### ARLS

[App page](https://appshunter.io/ios/app/arls/id6769889170)

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

**In-app purchases:** none


## Frequently asked questions

### Is Biorhythm free?

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

### Is ARLS free?

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

### Do Biorhythm or ARLS have ads?

Biorhythm shows ads; ARLS does not.

### Which is updated more often, Biorhythm or ARLS?

Biorhythm ships an update monthly, and ARLS every 9 days. Most recently, Biorhythm was updated on October 29, 2026 and ARLS on October 28, 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.*