USB Camera vs VividiaCam

"USB Camera" can let your iOS device connect to USB WebCam or video capture card. You can record video or capture snapshot, OR turn your phone into a wireless IP Camera via build-in RTSP/RTSPS and HTTP/HTTPS Server for security monitoring WITH Bi-directional audio support, you can use your browser to view, of course, include "IP Camera" App. "USB Camera" can push the video and audio to RTMP/SRT live media server (e.g. Push to YouTube, Facebook), and use for network broadcast. It supports the rtmps security protocol and SRT protocol and it can also push the media to multiple media server at the same time. It also supports HEVC/AV1 over RTMP and can be used for YouTube Live currently. It supports Multi Cam feature which allows you to connect multiple external USB cameras or video capture cards simultaneously and process into PIP video then transfer. It supports loop-recording. It can set auto-segment when recording and auto-delete old video archives when no enough storage.

VividiaCam app is designed to connect a USB camera (borescope, otoscope, microscope, endoscope, webcam, inspection camera, dental camera etc.) to an iPhone or iPad throufh Vividia U2i adapter. One can preview live videos, take pictures and videos with this app. Special features include crosshairs, zoom in and out, image rotation, image flipping, resolution selection, color/black-white/negative/vivid image mode selection, language selection. "Vividia, we help you see better."