# Biorhythm vs Shiori Diary

The clearest difference is in-app purchases: Biorhythm at none against Shiori Diary's 3. Shiori Diary's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Shiori Diary sells 3 in-app purchases, starting at $0.99 per month. Biorhythm asks for nothing beyond the download.

Biorhythm ships an update monthly, Shiori Diary every 2 weeks. Both last shipped on November 10, 2026.

## The numbers

| Metric | Biorhythm | Shiori Diary |
| --- | --- | --- |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [Jeonghwan Kim](https://appshunter.io/developer/429842114) | [Koji Tamatsu](https://appshunter.io/developer/6801192221) |

## 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


### Shiori Diary

[App page](https://appshunter.io/ios/app/shiori-diary/id6801804049)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shiori Plus Monthly | $0.99 | per month |
| Shiori Plus Annual | $9.99 | per year |
| Feature Pack | $2.99 | one-time |


## Frequently asked questions

### Is Biorhythm free?

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

### Is Shiori Diary free?

Shiori Diary is free to download, with in-app purchases available.

### Do Biorhythm or Shiori Diary have ads?

Biorhythm shows ads; Shiori Diary does not.

### Which is updated more often, Biorhythm or Shiori Diary?

Biorhythm ships an update monthly, and Shiori Diary every 2 weeks. Most recently, Biorhythm was updated on November 10, 2026 and Shiori Diary on November 10, 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.*