FAQ

Why is the app so large?

Gordon’s Sun Clock is designed to work completely offline.

The app contains:

• the Python runtime and the Kivy framework (via Python-for-Android)
• astronomical calculation libraries (Skyfield, NumPy, jplephem)
• the JPL planetary ephemeris DE440s excerpt
• global timezone geometry data (timezonefinder)
• high-resolution images of the planets
• several font sets

Because of this, the app does not depend on external servers or internet access once installed and runs completely offline (except for additional functionality like local weather).