You can use EpocCam as default webcam on video calling app like Zoom, Microsoft Teams, Skype, and Google Meet. EpocCam is easy to set up, and the basic functions are free to use. It’s available on all platforms, including iOS, Android, Windows, and Mac. Among those apps, EpocCam is perhaps one of the best offerings from Kinoni (its parent company). Both the App Store and Google Play Store are filled with such apps to convert your phone into webcam on Mac.