Simulate celestial body motion in 3D using Newtonian mechanics. Set mass, position, and velocity to observe gravitational interactions. Explore pre-made samples or create your own cosmic scenarios.


18+ similar apps compared and reviewed
The 100 Japanese Poems is great, but it's not the only option. Explore 18+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.


Simulate celestial body motion in 3D using Newtonian mechanics. Set mass, position, and velocity to observe gravitational interactions. Explore pre-made samples or create your own cosmic scenarios.








Test your knowledge of U.S. states and capitals in this engaging bubble-popping game. Learn state locations, capital names, and capital locations through interactive challenges. Compete for high scores on the Game Center leaderboard.


Explore the ancient Maya numeral system alongside modern decimal numbers. This app visually compares both positional notations, highlighting their unique place-value systems. It converts Maya numbers up to 1,279,999,999 into their decimal equivalents.


This app functions as a Mayan numeral calculator and decimal converter. It allows users to combine Mayan glyphs to represent numbers and convert between decimal and Mayan numeral systems. The core engine is open-source for educational expansion.


Learn over 9,000 common Japanese words with a flashcard app designed for Apple Watch. Utilize spaced repetition and audio pronunciation for effective vocabulary acquisition during short study sessions.




This app offers engaging spelling challenges for first graders, covering Common Core standards, Fry words, and sight words. It uses dynamic gameplay and rewards to motivate learning and build a strong vocabulary foundation.


This app offers a comprehensive Kanji learning experience for elementary school students, covering writing, reading, and vocabulary. It features over 2900 practice questions, including idioms and synonyms, with handwriting recognition for writing practice and stroke order guidance.

