In the android phone open this link and download and install iVMS-4500-4.7.7.apk
https://drive.google.com/drive/folders/ ... FlhbnhIjS5
if it does not allow you to install, change below setting in your phone.
In the "setting" search "unkonwn apps" and turn on "chrome"
<TVID DVR apps compatibility >
GuardingVivison does not support TVID DVR.
TVRmobile : supports TVID DVR. But, this apps does not support IP cams on TVID DVR.
iVMS-4500 apps works with TVID DVRs & IP cams on TVID DVRs.