# Biorhythms and Critical Days — user reviews > 147 indexed App Store user reviews of Biorhythms and Critical Days by Sensortronic, rated 4.70/5 from 320 ratings. - Source: https://appshunter.io/ios/app/biorhythms-and-critical-days/id1486142952/reviews - App overview in markdown: https://appshunter.io/ios/app/biorhythms-and-critical-days/id1486142952.md - Rating breakdown: 5★ 237 · 4★ 65 · 3★ 15 · 2★ 0 · 1★ 3 ## What do users think of Biorhythms and Critical Days? Overall sentiment: positive **Pros** - 👍 Accurate and helpful - 👍 Easy to use - 👍 Detailed information - 👍 Useful for planning - 👍 Reliable - 👍 Interesting and informative - 👍 Excellent design - 👍 Comprehensive profiles - 👍 Compatibility function **Cons** - 🐛 Inconsistent data - 🐛 Buggy critical days feature - 🐛 Unclear instructions - 🐛 Poor translations - 🔍 Cluttered UI with ads - 🔍 Limited customization options **Commonly reported bugs** - Login screen freezes - Incompatible with older devices - Incorrect biorhythm calculations - Overlapping text on mobile screens **Most requested features** - Add note-taking functionality - Expand future/past date range - Improve color contrast and readability - Provide more detailed compatibility analysis - Offer paid ad-free version ## Newest reviews (17 of 147) ### 4/5 — Функция *2026-03-17, version 4.4.0* Сделать виджет со всеми показателями дня ### 4/5 — Seems more complete than my other biorhythm app *2026-02-24, version 4.4.0* More metrics, not sure about accuracy. ### 5/5 — Bio *2025-04-26, version 4.4.0* Great ### 5/5 — Biorhythms and critical days *2025-04-02* This app is so right on! I find things expressed here are very accurate. I am surprised there is such a thing. ### 5/5 — Very scientific *2025-03-31, version 4.4.0* Very full for knowing what’s coming in future .. good help for planning ### 5/5 — Very Accurate *2025-03-29* This is surprising very accurate. It helps me to plan things according to where my levels are, and that’s helpful. ### 5/5 — Отличное *2025-03-17, version 4.4.0* Очень удобное приложение ### 3/5 — Still Figuring it All it *2025-01-28, version 4.4.0* Not really sure I understand it. ### 5/5 — Friends *2025-01-27, version 4.4.0* It’s great to be able to have friends critical days close. ### 5/5 — Ottimo *2025-01-24, version 4.4.0* Molto ottimo ### 5/5 — Accurate *2024-12-17, version 4.4.0* If you believe it’s very helpful ### 5/5 — The Best *2024-12-04, version 4.4.0* Really better than all the similar even those witches purchasable ### 5/5 — it’s fun *2024-11-10, version 4.4.0* just fun. believe in Jesus and you’ll be fine ### 5/5 — Simple to use *2024-10-04* This is a great way for me to check my rhythms as well as all my loved ones. It’s easy to read and a handy little tool. ### 5/5 — Biorhythm *2024-09-11* I don’t plan out my schedule based solely upon what the chart shows but I probably should since it’s been spot on for me when after having a life changing experience in 1975 I should have been more prepared for what happened to me and how I could have avoided the situation and outcome ### 5/5 — Посоветовала даже друзьям *2024-08-05, version 4.4.0* Я нумеролог , и биоритмы высчитаны правильно . ### 5/5 — Foresight a wonderful thing *2024-07-08* I love being able to look ahead and prepare myself; either with extra rest as I can’t really afford too many none physical days. I enjoy seeing that I’m going to be temperamental on these days so stay out of the way. My sister hooked me up and I’m forever thankful ## Most critical reviews (10 lowest-rated) ### 1/5 — Poco efficace *2025-01-23, version 4.4.0* Non sono entusiasta ### 1/5 — It's blah *2023-12-23, version 4.4.0* Not interesting ### 1/5 — Полнейший рандом *2023-08-19, version 4.4.0* Полнейший рандом - на один и тот же день может писать в одном окне - это отличный день для спортивных достижений, а в другом - это критичный день для физики - избегайте занятий спортом. И такие «моментики» сплошь и рядом. Калькуляторы (такие диски с подвижными шкалами и секторной линейкой) продаваемые в каждом ларьке в 90е были и то интереснее :) ### 1/5 — Waste of your time *2021-12-23* Be level minded about what this app says. Truth of the matter is, after following this app, paying special attention when it was time to bet on a game of chance,etc., while it was saying I had 100% chance of winning, to date, zero! I managed to hit one or two numbers but winning the big one? Negative. We are rational human beings. We should rely on our actions instead of what the stars are saying. My proof? 100% per this app. But when I checked my tickets? Only one number hit. I gave this a try for one year to verify what the experts are saying. It’s a fallacy. More testing are needed but I will not accept this as a scientific tool. ### 1/5 — 👎 *2021-05-24, version 4.4.0* Неправильно показывает физический ### 1/5 — Impossible d'ouvrir *2021-01-31, version 4.3.1* Un bandeau de pub cache en permanence l'accès à l'application. Même d'option payante. ### 1/5 — Garbage *2021-01-04, version 4.3.1* Too many ads blocking the buttons on the screen. Entering my info, checkmark submit button wouldn't work. Garbage app. ### 2/5 — Bad UI with ads *2025-09-28, version 4.4.0* It’s a pretty ugly UI/UX, with ads. No way to delete account data either. ### 2/5 — AFFINITY *2019-11-14, version 3.7.4* ALGORYTHM DOES NOT MACH AND THE CALCULATION DO NOT CORRESPOND DATES BEFORE TODAIT DOES NOT SERN THE CRITICAL DAYS ### 3/5 — Miss D McCarron *2025-10-05, version 4.4.0* The different Physical for example titles are half missing so I can’t read what the later one’s as they don’t fit on My fone screen. Also is there any instructions of how to use the App properly, to get the best out of using it? If these 2 issues were sorted, I would give more stars & a better review? ## Most praised reviews (10 highest-rated) ### 5/5 — Biorhythms and critical days *2026-04-19* This app is so right on! I find things expressed here are very accurate. I am surprised there is such a thing. Further situations strengthen this! It seems so right on! ### 5/5 — Зачастую совпадает состояние и биоритмы. *2026-03-24, version 4.4.0* Прикольное приложение ### 5/5 — для понимания *2026-02-26, version 4.4.0* использую для большей уверенности в каких то аспектах принятия решений и в принципе хорошая замена монетке (орел/решка) ### 5/5 — Отлично *2026-02-15, version 4.4.0* Отличное приложение.Все совпадает.Что хорошо,много ритмов и все четко работает ### 5/5 — Great App *2026-01-29, version 4.4.0* Accurate and helpful. ### 5/5 — Very Useful *2026-01-12, version 4.4.0* I appreciate how easy it is to use this app. Thanks for allowing calculation on multiple people! ### 5/5 — Interesting *2025-09-21* Much more detail than my biorhythm program I used 50 years ago. ### 5/5 — For warning *2025-07-19, version 4.4.0* Excellent ### 5/5 — Fatta bene *2025-05-15, version 4.4.0* Di facile consulto e precisa. Per la semplicità si consulta giornalmente. ### 5/5 — Thanks *2025-05-01, version 4.4.0* May blessings rain down on you 20 fold for all the brilliance and love and knowledge you share. --- *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 2026-09-09.*