The app allows users to use their iPhone's lock screen as a note keeper. Users can write notes, hide the keyboard, and take a screenshot to set as wallpaper.
Analyze audio signals with FFT spectrum analysis and oscilloscope display. Generate test signals and measure frequency responses. Sync FFT sweeps for real-time frequency characteristic observation. Input signals via connected devices.
Convert times between multiple time zones instantly. Display current local time for up to 20 cities. Customize city names and icons. Use background colors to indicate day or night. Choose 12 or 24 hour format. Access free color themes.
