Aviato
Your family sees takeoff, delays and landing without you sending a text
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Astera
A sky map for Android with lessons, a journal and a red night mode, no sign-up
For anyone teaching or learning the night sky on Android, Astera does it without ads, an account or even location access, and adds lesson plans with teacher guides.
Astera is an Android star map that follows where you point your phone; tap a star or planet for its distance, altitude and rise and set times. You can shift the time or place, pick a city instead of granting location, and set city, suburb or countryside skies so only visible stars show. A red mode covers every screen. Interactive diagrams explain Moon phases and light travel, lessons include teacher guides, and a journal exports as text. Zoom reveals about 69,000 faint stars. Updated 29 September 2026, by mrlatte.
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