The app is free to download and try. All lessons and activities unlock with one simple one-time purchase — no subscription, no ads, no auto-renew.
Tap "Unlock Everything" on the welcome screen and confirm the one-time purchase. A grown-up gate (a quick math question) appears first, as required for children's apps.
Open the app, tap the gear icon (top right), then "Restore Purchases". Use the same Apple Account you purchased with. Restore is also available on the welcome screen.
Yes. Everything is stored inside the app, so it works fully offline after download.
No. We collect no data at all. See our Privacy Policy.
Solar System for Kids is designed for children ages 6–8, with big buttons, calm navigation, no timers and no scores.