Threelane is designed for product demonstrations and the like, and it is free and open source. It can synchronize the recording of the screen, webcam, and mobile phone camera footage at one click, scan the QR code to pair with the mobile phone, without cables, etc., and automatically upload the mobile phone footage to WiFi when the recording stops. The recorded content can be split into scenes, the layout can be selected, it supports automatic panning with the cursor following, the audio source can be set, and it can be exported in MP4 format, with multiple screen orientations available. It supports multiple platforms, the editor has new features, the mobile phone preview can flip the camera, and the project can also be saved locally.