App works as advertised.
Bought the 960H 4-channel amcrest video security system. After installing all the cameras and hooking the recording unit to my router. Configuring the app was a breeze. Just press on add new device. Connect mode should be the default (P2P). Scan the QR code located on the amcrest box or you can find it in the on screen menu. Once its connect you can remotely watch the cameras anywhere you have a decent internet connection. 4G seems to be good enough.
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Amcrest Link for 960H DVRs