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Rytha
Biorhythmus, Tagebuch & Mond
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Now in English. Your biorhythm, your diary and the sky above you – all kept on your own device. No account, no cloud, no subscription.
Rytha accompanies your everyday life – quietly, on your own device.
Follow your personal biorhythm for body, soul and mind, note what matters in your diary, and see how sun and moon shape your day. On your own, or together with a partner.
WHAT RYTHA GIVES YOU
• Biorhythm cards for body, soul and mind, with the trend compared to yesterday
• A personal diary: a thought, a mood, a photo – ‚ as much or as little as you like
• History and calendar, so you can see how your days connect
• Sky calendar for your location: sunrise and sunset, moon phase and illumination, zodiac sign
• Name days from the German calendar
• Profiles for several people, and an optional link between two profiles to view their rhythms side by side
• A personal review as a PDF you can keep or share
• Home Screen widget for a glance at today
• App lock with Face ID, Touch ID or your device passcode
• Backup and restore, as a file you control
YOUR DATA STAYS YOURS
Rytha keeps your profiles, diary entries and attachments only on this device. There is no account, no cloud sync, and none of your data is sent to external servers. A backup is a local file – you decide where it goes and who sees it. Your location is used solely to calculate sun and moon times, and only after you allow it.
PREMIUM, WITHOUT A SUBSCRIPTION
The personal PDF review and linked partner profiles are Premium features. Buy once, keep it forever. No subscription, no recurring charges.
A NOTE ON BIORHYTHM
Biorhythm curves are calculated from your date of birth using fixed cycles. They are an aid for reflection, not a scientific measure. Rytha is not a medical app and does not give health advice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Rytha now speaks English.
• Full English interface, including dates, times and the personal PDF review
• Dates and calendars now follow your device language instead of being fixed to German
• Privacy manifest added for the app and the widget
• Location access is now requested after setup, not before it
• Smaller layout and wording fixes throughout
As always: everything stays on your device.
The developer, Thomas Stahmer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- User Content
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Thomas Stahmer
- Size
- 3.4 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Rytha Premium $5.99
- Copyright
- © Thomas Stahmer