Periodical

Arno Welzel

About this app

This application calculates the fertile days according to Knaus-Ogino and can track menstrual symptoms.

WARNING: It is not recommended to use this calendar to avoid pregnancy! There are more accurate methods, like measuring the basal body temperature.

The data can be backed up on a memory card or "internal" memory, if present.

If you have any further questions or want to help me with translations in other languages, please contact me via e-mail - thank you.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

You can obtain the source on my website.

Ratings and reviews

I love that it's ad free and open source. It works offline so my private data is not being sent who knows where. Unfortunately this means you can't easily use the app on multiple devices since your data is not being stored in any cloud, but that's the trade-off for privacy. Maybe something could be done in the future by running your own cloud but I'm not that much of a tech expert. But overall I like the app and appreciate it's still being maintained by the dev.

Very good app, pretty accurate, has some additional info (mood & symptoms) if you need to track it. No ads, no fees, no cloud storage—it'salmost perfect! I wish there was some kind of password/pin lock, but I can live without. I tried almost all period tracking apps, and I can say this one is of the best. Edit: it's gender-neutral, too, which is a huge thing for myself.

Love the app, everything is easy to use. But please add notifications! The main point of cycle tracking is so that you and your sheets are prepared for the big week. It's not possible to always be on top and remembering to check the app. Please add reminder notifications.

What's new

Added Catalan.