Astronomical Almanac
Support
About AperioEphemeris
AperioEphemeris is an astronomical almanac that calculates celestial events on your device. All calculations happen locally—no internet connection required.
Privacy & Data
AperioEphemeris collects absolutely no information from you.
The app uses location services only for on-device astronomical calculations. If location is not provided, the app defaults to UTC (Coordinated Universal Time). Your location is never transmitted, stored, or shared—it’s used solely for local calculations.
Frequently Asked Questions
Does the app need an internet connection?
No. All astronomical calculations are performed on your device. The app works completely offline once installed.
Do I need to provide my location?
Location is optional but recommended for accurate local calculations. If you don’t provide location access, the app will use UTC (Coordinated Universal Time) as the default.
How do I enable location services?
Go to iOS Settings > Privacy & Security > Location Services > AperioEphemeris and select “While Using App” or “Always”. The app will use your location only for on-device calculations.
The calculations seem incorrect. What should I check?
- Verify your device’s date and time are set correctly
- If using location, ensure Location Services are enabled for the app
- Check that your device’s time zone settings are accurate
How do I reset the app?
You can reset the app by deleting and reinstalling it, or by going to iOS Settings > General > iPhone Storage > AperioEphemeris > Offload App, then reinstalling.
System Requirements
iOS18.0 or later
DeviceiPhone or iPad
StorageMinimal space required
PermissionsLocation Services (optional, for local accuracy)
Need Help?
If you have questions or need assistance, please contact us:
When contacting support, please include your device model and iOS version to help us assist you more effectively.