Scoppy is an oscilloscope that consists of an Android App for your phone/tablet and firmware for your Raspberry Pi Pico. No programming is required. Signals are measured by the Pico and the waveform is displayed on the Android device.
You can use the demo mode to explore some of the capabilities of the app without having to connect to a Pico. To enable demo mode tap the USB badge at the bottom left of the screen. Then tap 'Change input' and select Demo.
Scoppy on Google Play Store
See Scoppy on GitHub for installation instuctions