Plan observing sessions by predicting celestial object visibility and weather conditions. Track star positions and calculate exposure times for astrophotography. Set location and date to get accurate sky maps and event alerts.
Percentages by entering two of three variables. Use a modified keyboard to input values, including fractions and decimals. Store calculations in a history log. View detailed solutions and share results. No advertisements.
The app offers a training system with 52 levels, including audio guidance, tips, and timers for various breathing exercises. It allows users to track personal breathing charts and exercise history, and share this data with instructors.
Play chess with customizable boards and adjustable difficulty levels. Challenge computer opponents or play online. Track game history and review moves. Save and load games. Share results via social media.
Learn skating through on-demand lessons with step-by-step tutorials from professional instructors. Connect with skaters globally to share progress and receive feedback. Access peer-to-peer coaching for tips and support.
Calculate missing sides of right-angled triangles using the Pythagorean theorem. Enter two sides to find the third. Save calculation history. Share complete solutions. Support for entering fractions. No advertisements.
Identify bird species using visual cues, calls, and habitat details. View high-resolution images, listen to audio recordings, and access detailed descriptions. Browse species facts, distribution maps, and behavior notes.