Comparison

Biorhythms and Critical Days vs Arhatic Trinity

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Biorhythms and Critical Days

This app calculates your personal biorhythms, critical days, and birth date compatibility. It supports multiple user profiles with customizable themes and reminders, offering daily insights and advice for physical, emotional, and intellectual cycles.

Highlights
  • Biorhythm calculation
  • Critical day identification
  • Birth date compatibility
  • Multiple user profiles
  • Daily highlights and advice
  • Customizable themes and reminders
Features
Read full description

Calculate your biorhythms and critical days, and check your birth date compatibility with anyone! Biorhythms is a personal biorhythm calculator and chart covering 8 cycles: physical, emotional, intellectual, intuition, fortune, aesthetic, awareness and spiritual, plus an overall daily rating. Create up to 10 user profiles, each with its own color theme and daily reminder. The clean, easy to use interface makes your daily biorhythm check quick and effortless. No account and no sign up: your personal data stays on your device. Features • Elegant, easy to use interface; • 8 biorhythm cycles plus an overall daily rating; • Calculates biorhythms from 2 weeks in the past to 2 months ahead; • Shows each cycle's daily value for the selected period; • Shows each cycle's daily trend (rising / declining); • Daily highlights: a short description and advice for each day; • Birth date compatibility for any two people; • Calculates critical days; • Short, useful advice for each critical day; • 18 color themes to choose from; • Personalized color theme for every user profile; • Personalized daily reminder for every user profile; • Up to 10 user profiles; • Available in 8 languages. Biorhythm theory Biorhythm theory states that our lives move in predictable undulations, driven by cycles that start at birth and run at a fixed pace. The three classic cycles are: • Physical, 23 days; • Emotional, 28 days; • Intellectual, 33 days. Beyond the classic three, the app also charts five extended cycles: intuition (38 days), fortune (21 days), aesthetic (43 days), awareness (48 days) and spiritual (53 days). Critical days A critical day comes when a cycle crosses the zero line, switching from its high phase to its low phase or back. Such days have been described as days of flux and instability. They are not days when an accident will happen, but days when you may be more accident prone. Simply knowing it is a critical day helps you stay on guard and plan around it. Privacy notes • Your personal data (e.g. name and date of birth) is stored locally within your instance of the Biorhythms app only; • If you uninstall the app, your personal data is deleted completely from your device; • We do NOT store your personal data on our premises.

About

Arhatic Trinity

Features
Read full description

A sacred home for Arhatic Yoga practitioners — and a free breath for everyone. BREATHE — FREE FOR EVERYONE A calm breathing pacer with gentle tone, wave, or pulse guidance and soft opening and closing music. Shape your own patterns and pace. No account tier required — the breath is a gift, always. EMOTIONS — YOUR PRIVATE JOURNAL Log how you feel and review it by day, week, or month. Navigate to any day and back-fill an entry. Private to you — never counted, never shared. FOR VERIFIED ARHATIC YOGA PRACTITIONERS Completed a GMCKS Arhatic Yoga workshop? Share your certificate in the app (or by email) — verification is by hand and always free. Your practice tabs then open: • Dashboard — where you stand today: current virtue, mandala, streak, and this week's meditations • Daily Log — tick the lineage practices you completed, day by day • Character building and mandala cycles with your own start dates and lengths • Tithing log — private to you, always KRIYASHAKTI For practitioners with the Kriyashakti workshop: wishes and tithing side by side — decree, materialize, and log. OUR PROMISE Free forever. No ads. No analytics. No paywall — verification is never payment. Tithing and Kriyashakti records are never aggregated or shared, not even anonymously. Aspire Higher · Radiate Brighter arhatictrinity.com · support@kirusai.com

Screenshots

Biorhythms and Critical Days4 screens
Arhatic Trinity4 screens

Verdict

The call

The clearest difference is ads: Arhatic Trinity at none against Biorhythms and Critical Days's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Biorhythms and Critical Days ships an update every 3 weeks, Arhatic Trinity fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
Biorhythms and Critical Days versus Arhatic Trinity: the parameters behind the verdict, then further details
ParameterBiorhythms and Critical DaysArhatic Trinity
PriceFreeFree
Rating4.7 (326 ratings) — better—
Positive reviews89.1% of reviews—
Number of ratings326 — better—
Update frequencyEvery 3 weeksFortnightly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size26 MB53 MB
Age rating4+4+
DeveloperSensortronicSatheesh Kumar Mahalingam

Bugs and requests

Biorhythms and Critical Days

Reported bugs

4 issues
  • Login screen freezes
  • Incompatible with older devices
  • Incorrect biorhythm calculations
  • Overlapping text on mobile screens

Requested features

5 requests
  • Add note-taking functionality
  • Expand future/past date range
  • Improve color contrast and readability
  • Provide more detailed compatibility analysis
  • Offer paid ad-free version

Arhatic Trinity

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Biorhythms and Critical Days

No in-app purchases

None

Arhatic Trinity

No in-app purchases

Questions

Is Biorhythms and Critical Days free?
Biorhythms and Critical Days is free to download, with no in-app purchases.
Is Arhatic Trinity free?
Arhatic Trinity is free to download, with no in-app purchases.
Do Biorhythms and Critical Days or Arhatic Trinity have ads?
Biorhythms and Critical Days shows ads; Arhatic Trinity does not.
Which is updated more often, Biorhythms and Critical Days or Arhatic Trinity?
Biorhythms and Critical Days ships an update every 3 weeks, and Arhatic Trinity fortnightly. Most recently, Biorhythms and Critical Days was updated on November 3, 2026 and Arhatic Trinity on October 31, 2026.

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