First described in the late 1800s, the term biorhythm refers to the rhythmic cycles that affect a persons performance in various areas such mental and physical ability and emotional activity.

Biorhythm Calculator provides a quick and easy way to see a three week outlook based on accepted biorhythm cycles. It stores the last birthdate entered and always opens to the current date so simply launching the app provides up to date information. Convenient controls are provided to look ahead and back a week at time allowing you to quickly assess future and past tasks. The plot length is can be set from 3 to 6 weeks and the plot start can be left, right, or center aligned. Biorhythms can be calculated for any date in the future or past by entering the information directly.

What’s New

Version 1.1.1

Fixed an issue that could cause biorhythms that were center plotted to display incorrectly.

Ratings and Reviews

3.7 out of 5
3 Ratings

3 Ratings

E.Y a π'd πpr. ,

Percent (%) ≠ Percentage

Your vertical axis should be percent as written in your info section.
A percentage is either a count or a measurement numeral output of using a percent (%) numeral.
While percent (%) is an operator to transform either a count or a measurement numeral through the metric of 100.
Please correct this to match your informtion.

Cora Stewart ,

:| needs more….

There is nothing left un charted.

there is no way out of the app. Unless you force quit the app it will stay forever…not cool
there is no "help" or anything so if you do not know what Aesthetic and awareness are talking about or why they are good to know about your screwed…

It is a great start but there are some details missing. if they would add a stop or exit I would feel better about the app and give it a 4 start. If they added some more information for the lay people who would love to know more about biorhythms and how to work with them that would be a 5 start app right now its a 3 star app at best. (I really woud have given this a 2 star but I love that they have the spiritual/awareness/ aesthetic added. not many programs have those so for that I give 3 stars.) With that said Please keep working and adding to this program.


@Allzup ,

Lily @Allzup

Shows the cycles. That’s all I need. I interpret them for my clients, so this works for me. A few more options (save info, download charts, etc.) would be nice.

App Privacy

The developer, True Blue Apps, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


John Miskimins
2.5 MB

OS X 10.6.6 or later



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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