Practice English with interactive exercises and materials. Unlock additional content via in- purchase. Track common errors and review classic problems. Suitable for all skill levels.
Identify coins by scanning images. Track collection details like year, mint mark, and condition. View values and historical data. Organize coins into folders and albums. Export data and share findings.
Measure angles between two surfaces using accelerometer and gyroscope. Determine angles between lines on a plane by aligning device edges. Display measurements in degrees. Switch between protractor and finder modes.
