Raspberry Pi Pico Oscilloscope for your Smart Phone or Tablet, Scoppy Oscilloscope
Compocket Minis Digital Mini USB Oscilloscope, Pocket-Sized, 2 Channels, 2 MHz Bandwidth, Works with Smartphones, Tablets & PC, Smart Measurements in Seconds: Amazon.com: Industrial & Scientific
Raspberry Pi Pico Oscilloscope for your Smart Phone or Tablet, Scoppy Oscilloscope
$3 Homemade Oscilloscope for Smartphones and Tablets. - YouTube
android - How can I use my smartphone as an oscilloscope? - Electrical Engineering Stack Exchange
DIY SmartPhone Oscilloscope using Raspberry Pi Pico
Oscilloscope & Signal generator - Red Pitaya
Portable Metal DSLogic DS4T212 70M/200MSa/2Mpts Touch Screen Oscilloscope Mini Dual Channel 1G Sampling Rate| | - AliExpress
FHDM's DSO-500K Turns a Raspberry Pi Pico W Into a Wi-Fi Oscilloscope with Android Interface - Hackster.io
Osciloscopio iMSO-104- Envío en 24 horas | getDigital
Chinese electronics products tested (124 tests): DS212 smartphone oscilloscope tested
A Preamplifier for Smartphone Oscilloscopes : 6 Steps (with Pictures) - Instructables