Simulate collisions with realistic physics. Visualize gravitational interactions between stars and centers. Use OpenGL point sprites for detailed rendering. Explore dynamic movements and interactions.
Record audio, get expert feedback, improve listening
Record and submit audio for professional feedback on pronunciation and listening skills. Access over 1000 lessons including native speaker content and exam prep materials.
Create chemical mixtures by combining up to four elements in a beaker. React elements to form new compounds and molecules. Learn about basic chemicals like carbon, hydrogen, and oxygen. Progress through increasingly complex mixtures and reactions.
Explore country maps with detailed location data and access comprehensive fact book information. Search for country-specific details, view retina vector maps, and navigate between locations with intuitive zoom and pan features.
Explore Yi Jing hexagrams for divination. Select a hexagram to receive insights on current situations. View interpretations of the first hexagram and its evolving lines. Access explanations of the second hexagram for future predictions.
Play a -style game by tilting the screen to guess words. Players give clues without speaking the . Use AI-generated decks with over 10,000 cards. Supports 2-10 players. Adjust screen orientation to mark correct answers.
The app presents daily events from World War One, detailing what happened and where it occurred. It includes zoomable maps and links to Wikipedia articles for further information.
Test knowledge of inventors and through multiple-choice quizzes. Track progress in Game Center. Explore a timeline with linked Wikipedia entries for additional information.
Collect and share and famous phrases. Save and organize using folders and tags. Create and manage favorite lists with folders and tags. Access 5 archives containing in English, Italian, Spanish, French, and German.
Calculate decayed activity using mCi or Bq units. View decay charts with tap-to-examine features and customizable input parameters. Save chart snapshots to camera roll. Estimate dose rates for isotopes as point sources at specified distances.
Search for words across multiple dictionaries including Urban , .com, and Oxford . View definitions, synonyms, and etymology. Track vocabulary progress with preloaded word lists for SAT, GRE, and TOEIC. Save search history and review word details.