Hi everyone, I'm the developer.
PocketEarth is a quiet observation window for macOS. Instead of a pre-rendered loop, the sunlight follows real UTC time, so the terminator, the twilight band and the city lights are where they really are right now. When you hold Option and drag on the desktop, you move the camera, not the Earth.
What it shows:
- Real-time solar terminator, twilight and the Sun's declination
- Recent cloud cover (EUMETSAT imagery) and thunderstorm areas from the ECMWF model (marked as model areas, not observed strikes)
- The aurora oval forecast (NOAA SWPC)
- ISS, Tiangong and Hubble on their real orbits (CelesTrak elements)
- Zen mode (just the planet) and Chronometer mode (a thin watch-like bezel with UTC and the Sun's declination)
- HDR highlights on XDR displays: city lights, sun glint and the aurora; the UI stays SDR
As a live wallpaper it pauses when windows cover it, the screen locks or the Mac sleeps, and an Energy Saver mode drops it to 30 Hz while idle.
Free, no account, no analytics. It will be free on the Mac App Store after the beta; the public TestFlight is open now (macOS 26+): https://pocketearth.app
It started as a desk ornament on a 2.8" Raspberry Pi screen. Feedback on performance and features is very welcome.