Measure and save near and distant visual acuity using Kay Picture optotypes and Sloan letters. children aged 18 months and adults. Choose single or crowded presentations and distances. Save and export results to a spreadsheet.
Learn Japanese language with tests for levels N5 to N1. Practice vocabulary, grammar, reading, and kanji. Track progress with progress tables and status updates. Review results and resume incomplete tests.
Displays current outdoor temperature using GPS or WiFi location. Shows temperature in Celsius or Fahrenheit. Requires internet connection for accurate readings.
Set wallpapers with high-definition astronomical images. Browse curated 4K space visuals categorized by themes. Download and set as home or lock screen. No data collection or unnecessary permissions.
