Android Portable Digital Oscilloscope | Oscilloscop Digital Usb Android - Digital - Aliexpress
HScope - Apps on Google Play
DIY SmartPhone Oscilloscope using Raspberry Pi Pico
Android Portable Digital Oscilloscope | Oscilloscop Digital Usb Android - Digital - Aliexpress
Loto USB Oscilloscope OSC482M for Both Android Phone/Tablet & Windows PC, 2 Channels, 50M S/s, 20MHz (Bandwidth), 8~13 bit Vertical Resolution: Amazon.com: Industrial & Scientific
LabNation SmartScope: unique multi-platform USB oscilloscope | Elektor Magazine