# BiorhythmΩ — Check it every morning.

> Daily biorhythm calculator for physical, emotional, intellectual, and intuitive cycles. (iPhone/iPad app by Jeonghwan Kim.)

- Source: https://appshunter.io/ios/app/biorhythm/id433363390 (this page in markdown: same URL + `.md`)
- Developer: [Jeonghwan Kim](https://appshunter.io/developer/429842114)
- Category: Lifestyle, Health & Fitness
- Price: $0.99
- Rating: 4.70/5 from 498 App Store ratings · 225 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Russian, Chinese (Simplified, China), European Spanish
- Released: 2011-04-29
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/biorhythm/id433363390/reviews.md

## What is BiorhythmΩ?

◉ Protect yourself by checking biorhythm daily.

Stamina, judgment, emotion, etc.
If you are not feeling well about the following measures, how about checking your biorhythm?
If your biorhythm does not function appropriately, it is recommended to avoid unreasonable activities. Something might you don't want to happen.
Biorhythm can be referenced in all areas of your life such as learning, sports and sales.

◉ It will advise your future.

Suddenly, some of the celebrities faced traumas
The cases showed that their biorhythms weren't good. Was it a coincidence?

◉ What is biorhythm?

Biorhythm is the physiological cycle of a physical, emotional, and Intellectual. These three cycles are repeated in a uniform pattern based on your birthdays, and there is a difference in activity efficiency or ability depending on the combination of these patterns.

The four rhythm cycles and calculations are as follows.

d = number of days of living
Physical rhythm: sin (2π d / 23)
Emotional rhythm: sin (2π d / 28)
Intellectual rhythm: sin (2π d / 33)
Intuitive rhythm: sin (2π d / 38)

Each rhythm has a value from -100 to +100, and  this value indicates the status.

Low stage: -100 to -1
High stage: +1 to +100
Dangerous Days: 0 (at the time of transition from + value to - value or from - value to + value)

◉ Explanation of Application function

[Biorhythm]
• Display the four rhythms of a user as values and graphs
• Change dates easily to view biorhythms on multiple dates
• Connect with analysis function

[User]
• Integrated management of multiple users' biorhythms
• Connect to the biorhythm graph screen

[Analysis]
• List biorhythms of 31 days
• Extracting dates for state classification
• Performance analysis by biorhythm

[Union]
• Calculate the average of two or more users' biorhythms

[Share]
• Send biorhythm using messages or email

[Information]
• Summary of usage
• Help
• Contact the developer

◉ It is not a simple graph.

• Accurate data using formal algorithms
• Sophisticated and easy-to-see graphs
• Send biorhythm using messages or email
• Biorhythm integration management of multiple people
• Additional features different from other biorhythm apps
• Easy to use at anywhere, at anytime
• Preview of future biorhythms

◉ Notification

• If you have any questions, please use the email function on the app.

## Key features

- Daily biorhythm calculation
- Physical, emotional, intellectual, intuitive rhythms
- Graph and value display
- Multi-user management
- 31-day analysis and prediction
- Biorhythm sharing
- Average biorhythm calculation

## Chart rankings

- #181 in Top Paid · Lifestyle (US App Store)

## What do users think of BiorhythmΩ?

Overall sentiment: positive

**Pros**

- 🌟 Accurate and reliable
- 👍 Easy to use and understand
- 🔍 Helpful for planning and self-awareness
- 💻 Great user interface
- 🤝 Useful for comparing with others

**Cons**

- 🐛 Occasional crashes or bugs
- 📱 Needs widget support
- 🔄 Difficulty determining critical days
- 🎨 Outdated or unappealing design

**Commonly reported bugs**

- App not working on iPad
- Freezing or unresponsive on certain devices

**Most requested features**

- Add more customization options
- Integrate with calendar/scheduling apps
- Provide more detailed analysis and insights
- Add support for multiple user profiles

## Recent user reviews (10 of 225)

All indexed reviews: https://appshunter.io/ios/app/biorhythm/id433363390/reviews.md

### 5/5 — Accuracy plus

*2026-08-11, version 7.00*

Accurate app. I don’t check every morning, but do when I’m having a depleted day and figure out it’s normal. I love being able to combine family groups and checking the rhythm before a visit or event.  Worth the investment.

### 5/5 — I love it!!

*2026-08-02, version 7.00*

I live with my long time girlfriend and her sister. The ability to AVERAGE all three of us is great !!!  Used a lot of these program for many years - all the way back to versions in basic - and this is by far the easiest, fastest, in doing exactly what it's supposed to!

### 5/5 — Perfect

*2026-04-09, version 6.80*

Am so glad you guys make this app so easy to use 👌

### 2/5 — Pro Version still shows ads

*2026-03-09, version 6.80*

Pro Version still shows ads. Con.

### 5/5 — The accuracy is incredible!

*2026-02-13, version 6.80*

I’ve been a believer in biorhythm since the 70s and this app is so versatile and useful. I sometimes don’t use it for days and then notice I’m forgetful, clumsy, etc. and then after looking up the chart I see why it could be. The same goes for the days that I feel more in tune and positive, energetic, the rhythms are high.

### 3/5 — Update Fehler

*2025-12-31*

Letzte update ist fehlerhaft. Zum Beispiel unten keine Icons mehr.

**Developer response:** Hallo,
Unsere Tests bestätigen, dass es auf allen Geräten einwandfrei funktioniert. Bitte senden Sie uns über die Anfragefunktion in der App eine detaillierte Fehlerbeschreibung inklusive Geräteinformationen.

### 5/5 — 기능건의

*2025-11-28*

바이오리듬 위젯이나 다양한 바이오리듬(찾아보니 3개가 기본이고 확장된 것도 있더라고요)이 지원되면 좋겠어요. 그리고 앱 열자마자 바로 그래프를 볼 수 있었으면 좋겠어요. 들어가서 또 메뉴진입하는게 번거롭더라고요.

### 5/5 — Best biorhythm app

*2025-10-28, version 6.74*

I love this app and use it daily. It keeps me in check with myself. “Know thyself”

### 5/5 — Отличное приложение

*2025-07-31*

Удобно, всё понятно, добавление и сравнение людей. Короче не бесполезная покупка)

### 5/5 — Great value

*2025-07-02, version 6.70*

For such a token payment this is a really excellent app, all the important information you need from a touch of a button.
There's also a great guide for potentially good and bad days ahead,it certainly explained why I'm currently sleeping so badly.
You could see it in the chart at a glance, definitely worth every penny.

## Frequently asked questions about BiorhythmΩ

### What does this app do?

This app calculates and displays your daily biorhythms, including physical, emotional, intellectual, and intuitive cycles. It uses your birthday to predict your potential for stamina, judgment, and emotion, offering insights into optimal times for activities and advising caution during low or dangerous periods.

### How are biorhythms calculated?

Biorhythms are calculated using formal algorithms based on your birthday. The app tracks four cycles: physical (23 days), emotional (28 days), intellectual (33 days), and intuitive (38 days). Each rhythm is represented by a value from -100 to +100, indicating high, low, or dangerous stages.

### Is this app free to use?

Yes, the application is free to use. There are no in-app purchases or advertisements mentioned in the provided description.

### Can I track biorhythms for multiple people?

Yes, the app supports integrated management of multiple users' biorhythms. You can easily switch between users and view their individual biorhythm graphs and analyses.

### What are 'Dangerous Days'?

Dangerous Days are identified as the moments when a biorhythm cycle transitions from a positive value to a negative value, or vice versa. The app highlights these transition points, suggesting that it may be advisable to avoid unreasonable activities during these times.

## Version history (last 5 releases)

### 7.10 — 2026-08-14

Regular inspection and maintenance

### 7.00 — 2026-06-27

Regular inspection and maintenance

### 6.83 — 2026-06-20

Minor bug fixes

### 6.82 — 2026-06-18

Stability improvements and bug fixes.

### 6.81 — 2026-05-08

Stability improvements and bug fixes.

## Apps similar to BiorhythmΩ

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Biorhythm-365](https://appshunter.io/ios/app/biorhythm-365/id570628630) | 4.7 (3,864) | Free | Lifestyle |
| [Genius Insight Biofeedback](https://appshunter.io/ios/app/genius-insight-biofeedback/id6477995324) | 4.8 (487) | Free | Lifestyle |
| [MyBioCycle](https://appshunter.io/ios/app/mybiocycle/id1551432328) | 4.5 (2) | Free | Lifestyle |
| [Indian Numerology. Biorhythms](https://appshunter.io/ios/app/indian-numerology-biorhythms/id1182757838) | 5.0 (14) | Free | Lifestyle |
| [Humanist](https://appshunter.io/ios/app/humanist/id509238619) | 3.5 (17) | Free | Lifestyle |
| [AI HD: My Human Design App](https://appshunter.io/ios/app/ai-hd-my-human-design-app/id1672849136) | 4.6 (45) | Free | Lifestyle |

## More apps by Jeonghwan Kim

- [iContacts+: Contact Group Tool](https://appshunter.io/ios/app/icontacts-plus-contact-group-tool/id548506487)
- [Biorhythm-365](https://appshunter.io/ios/app/biorhythm-365/id570628630)
- [iLocation: Here!](https://appshunter.io/ios/app/ilocation-here/id647695160)
- [iLocation+: Here!](https://appshunter.io/ios/app/ilocation-plus-here/id650008859)
- [iContacts: Contact Group Tool](https://appshunter.io/ios/app/icontacts-contact-group-tool/id1119630690)

All apps by Jeonghwan Kim: https://appshunter.io/developer/429842114

## Related topics

[the biorhythm](https://appshunter.io/ios/topics/the-biorhythm) · [biorhythm cycles](https://appshunter.io/ios/topics/biorhythm-cycles) · [biorhythm alertness](https://appshunter.io/ios/topics/biorhythm-alertness) · [biorhythm daily](https://appshunter.io/ios/topics/biorhythm-daily) · [biorhythm calculator simple](https://appshunter.io/ios/topics/biorhythm-calculator-simple) · [biorhythm calculate](https://appshunter.io/ios/topics/biorhythm-calculate) · [biorhythm](https://appshunter.io/ios/topics/biorhythm) · [biorhythm chart](https://appshunter.io/ios/topics/biorhythm-chart)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*