Rule of Twelfths
ALED RHYS JEFFREYS Utilities iPhoneiPadiPod touch
Rule of Twelfths is a free Utilities app for iPhone and iPad by ALED RHYS JEFFREYS. Requires iOS 17.6. Updated October 23, 2025.
- Price
- Free
- on the App Store
- Size
- 3 MB
- Age 4+
- Updated
- Oct 23
- 2025 · v1.0
Screenshots
About Rule of Twelfths
Calculates the duration, range and rule of twelfth estimates from tide times and heights for semi-diurnal tides. Add your own time and height values for reference to the charts.
App privacy
The developer, ALED RHYS JEFFREYS, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Rule of Twelfths | – | Free | October 23, 2025 | |
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