Free
In-App Purchases
Rating summary
About
Play & explore the 3D solar system! Control cosmic time, collect planets, take fun astronomy quizzes, and unlock galaxies. Fully offline dark-mode space simulator with zero data collection.
What's New in Keplex
1.0
July 13, 2026
6
In-App Purchases
$5.99
Keplex Coin 20
Keplex Coin 20