WOTS calculates real sunrises, sunsets and twilights accounting for the mountains, hills and terrain around you — not just the geometry of the sky.
Computed from the actual terrain around you (digital elevation model), not a theoretical sea horizon.
Precise ephemerides, moon phases, planet positions for any date, time and location.
How civil, nautical and astronomical twilight interact with your real horizon.
Two tools to understand what the sky offers at a given location and date: which objects are visible throughout the night or only near twilight, and which are instead out of view.
Real-time passes from Heavens-Above for your location.
Your real landscape, ready to import into your favorite planetarium.
You can draw your own particular horizon by adding natural or artificial obstacles that hide parts of it, even tracing over panoramic photos.
Compact on smartphone, extended on PC with a denser, professional "Pro" interface.
1. After purchase you'll receive your license code by email.
2. Open the app and go to the "System" panel, "License" section.
3. Paste the code into the "License code" field and press "Apply and Recalculate".
4. From that moment your access is unlimited, with no 16-day limit.