# Biorhythm Alertness — Multiuser daily biorhythm > Tracks and visualizes personal biological rhythms with critical day notifications. (iPhone/iPad app by Bodnar Marin.) - Source: https://appshunter.io/ios/app/biorhythm-alertness/id1351359147 (this page in markdown: same URL + `.md`) - Developer: [Bodnar Marin](https://appshunter.io/developer/1344307163) - Category: Health & Fitness, Medical - Price: Free with in-app purchases - Rating: 2.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 5 MB - Languages: American English - Released: 2018-02-22 - Data updated: 2026-06-03 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/biorhythm-alertness/id1351359147/reviews.md ## What is Biorhythm Alertness? Our life is affected by rhythmic biological cycles (biorhythms) that move in sinus curves starting at your birth and continuing throughout your whole life, influencing you in many ways. The four rhythms of particular importance are: Physical, Emotional, Intellectual and Intuitive. Critical Day is a day of a particular rhythm when it crosses the X-Axis from the top down. The critical phase is the most vulnerable time for an individual, and the abilities associated with a particular rhythm can be very low.At this moment you receive a notification. Key Features: Multi-User Functionality: Biorhythm Alertness supports multiple user profiles, allowing family members, friends, or colleagues to track their biorhythms effortlessly. Simply enter your name and birthdate to create a personalized profile and gain insights tailored to your unique rhythms. Visualize Your Rhythms: Dive into the fascinating world of biorhythms with Biorhythm Alertness's visually engaging graphs. By displaying your physical, intellectual, emotional, and intuitive curves, you can gain a deeper understanding of how these cycles impact your daily life. Toggle Display: With the convenience of dedicated buttons, you have the power to toggle the display of each biorhythm curve individually. Whether you want to focus on your physical well-being, intellectual prowess, emotional balance, or intuitive insights, Biorhythm Alertness allows you to examine them one at a time. Simple Registration: Biorhythm Alertness values your time and privacy. The registration process is quick and straightforward, requiring only your name and birthdate to create a user profile. Your personal information is securely stored, ensuring the utmost confidentiality. User-Friendly Interface: Biorhythm Alertness prides itself on its intuitive and user-friendly interface. Navigating through the app is effortless, making it accessible to users of all levels of tech-savviness. Whether you're a seasoned biorhythm enthusiast or new to the concept, you'll find Biorhythm Alertness a breeze to use. ## Key features - Multi-user profile support - Visualizations of physical, emotional, intellectual, and intuitive rhythms - Critical day notifications - Toggle display for individual rhythm curves - Simple registration with name and birthdate - User-friendly interface ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Biorhythm Alerter | $0.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/biorhythm-alertness/id1351359147/reviews.md ### 2/5 — Not working now even with purchase. *2019-06-11* This used to be good but it is now stuck on “add another person” and I cannot get to my biorhythms. I even purchased it with no ads thinking that would help but it did not. Restarted so, restarted phone..... nothing works. Please help me. ### 1/5 — Too much ads *2019-01-28* instance ad any time you use, really not worth to use. ## Frequently asked questions about Biorhythm Alertness ### What are the main biorhythms Biorhythm Alertness tracks? Biorhythm Alertness tracks four primary biorhythms: Physical, Emotional, Intellectual, and Intuitive. These rhythms are presented as sinus curves influenced by your birth date. ### How does Biorhythm Alertness notify users of critical days? When a particular rhythm crosses the X-axis from top down, it's considered a critical day. Biorhythm Alertness sends a notification to alert you during these vulnerable periods. ### Can I track biorhythms for multiple people with Biorhythm Alertness? Yes, Biorhythm Alertness features multi-user functionality. You can create personalized profiles for family members, friends, or colleagues by entering their name and birthdate. ### How accurate is the biorhythm data in Biorhythm Alertness? The app's description states that biorhythms are based on rhythmic biological cycles starting at birth. While the concept is presented, specific data accuracy metrics are not provided. ### What devices is Biorhythm Alertness available on? Biorhythm Alertness is available on iPhone, iPad, and iPod devices. It is designed for iOS users. ### When was Biorhythm Alertness last updated? The latest version of Biorhythm Alertness was last updated on July 2, 2023. The app was initially released on February 22, 2018. ### Does Biorhythm Alertness have ads? No, Biorhythm Alertness does not contain advertisements. The app is free to download and use. ### What is the user sentiment for Biorhythm Alertness? User sentiment appears to be mixed, with the app holding a rating of 2.0 stars from 4 ratings. This suggests a portion of users may have encountered issues or had negative experiences. ## Version history (last 5 releases) ### 9.0 — 2023-07-02 Update to IOS 16 ### 8.0 — 2021-09-10 Add privacy policies ### 7.0 — 2020-03-30 Update to IOS 13.4 ### 6.4 — 2019-07-08 Solve unexpected interstitial ads ### 6.3 — 2019-06-29 Optimized for new IOS version ## Apps similar to Biorhythm Alertness | App | Rating | Price | Category | | --- | --- | --- | --- | | [Rise: Meditation Timer](https://appshunter.io/ios/app/rise-meditation-timer/id1635841355) | 4.8 (17) | Free | Health & Fitness | | [ProSomnus® Oxymetrx™ App](https://appshunter.io/ios/app/prosomnus-oxymetrx-app/id6448197770) | 5.0 (8) | Free | Health & Fitness | | [System - understand yourself](https://appshunter.io/ios/app/system-understand-yourself/id6480427972) | 1.0 (1) | Free | Health & Fitness | | [Calming Triggers: Therapy Tool](https://appshunter.io/ios/app/calming-triggers-therapy-tool/id6476431256) | 4.6 (37) | Free | Health & Fitness | | [BiAffect3](https://appshunter.io/ios/app/biaffect3/id6451423106) | 5.0 (6) | Free | Health & Fitness | | [HeartMath](https://appshunter.io/ios/app/heartmath/id6446414998) | 4.9 (4,275) | Free | Health & Fitness | ## More apps by Bodnar Marin - [BM FineWords](https://appshunter.io/ios/app/bm-finewords/id1344307164) - [LongWords](https://appshunter.io/ios/app/longwords/id1450797812) - [SafeDays](https://appshunter.io/ios/app/safedays/id1457188727) - [Graphos](https://appshunter.io/ios/app/graphos/id1477970952) - [NumberNexus](https://appshunter.io/ios/app/numbernexus/id1496117061) All apps by Bodnar Marin: https://appshunter.io/developer/1344307163 ## Related topics [biorhythm alertness](https://appshunter.io/ios/topics/biorhythm-alertness) · [biorhythm daily](https://appshunter.io/ios/topics/biorhythm-daily) --- *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 2026-06-03.*