Periodical is made and published by Arno Welzel. AppBrain is an independent app data site and isn't affiliated with Arno Welzel. The app name, icon, screenshots and description belong to Arno Welzel and are shown as published on Google Play.
AppBrain's verdict
EstablishedLoved by users- Rating on Google Play
- 4.84
- 173 ratings
- Installs
- 28 thousand
- Last updated
- September 2, 2026
- Ads
- No ads
- Size
- 2.93 MB
Periodical has 28 thousand installs. Users love it: 4.8 stars from 173 ratings.
User feedback
Ratings and reviews on Google PlayComments on Periodical for Android
Google Play Rating history and histogram
Store listing
By Arno Welzel, from Google Play“A menstrual calender with calculation of fertile days according to Knaus-Ogino.”
Description by Arno Welzel Written by the developer, not by AppBrain. Click to read.
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.
Recent changes:
A cycle can start without change of the average calculation.
Safety and technology
Found in the app by AppBrain- Ads
- No ads
- Price
- Free
- Libraries
- 12
- App size
- 2.93 MB
- Needs Android
- 5.0+
- Content rating
- Everyone
Technologies used by Periodical
Releases
Updates seen on Google Play- Version
- 1.97
- Launched
- May 2012
Alternatives
Similar apps and more from Arno WelzelAlternatives to Periodical
Installs
Tracked by AppBrain- Last 30 days
- 490
- Per day
- 16
- 30-day average
- Play install range
- 10+ thousand
- Launched
- May 2012
Installs over time
Periodical has been installed 28 thousand times. Over the past 30 days, it averaged 16 installs per day.
Rankings
Google Play top chartsGoogle Play Rankings for Periodical
About the app and developer
About Periodical
Periodical is a health & fitness app developed by Arno Welzel.
Install Statistics
Periodical has been downloaded 28 thousand times. In the last 30 days, the app was downloaded 490 times.
User Ratings
Periodical is rated 4.84 out of 5 stars. The rating is based on 170 ratings.
App Information
Periodical is freely available from Google Play. The APK size is 2.93 MB. The latest APK version available is 1.97. The last update was on September 2, 2026.
Technical Requirements
Periodical requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since May 2012.
App Performance Report
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