Vacron DVR iPhone App

Try using either IP cam viewer pro or the VacronViewer App (FUHO TECNOLOGIES)

VacronViewer : https://itunes.apple.com/au/app/vacronviewer/id780070117?mt=8

VacronViewer : Android : https://play.google.com/store/apps/details?id=com.fuho.vacronviewer&hl=zh_TW

In IP Cam Viewer I choose FUHO and picked one of the 4 models they had at the time worked fine.
Or you can use the Automatic search tool it works for nearly all models of DVR or Cameras.

Download the App

IP Cam Viewer Pro : https://itunes.apple.com/au/app/ip-cam-viewer-pro/id402656416?mt=8

IP Cam Viewer light : https://itunes.apple.com/au/app/ip-cam-viewer-lite/id397322405?mt=8

Run IP Cam Viewer, select Manage cameras icon, then select Manage cameras,

Select Options

Select Scan Cameras

Type in the Cameras IP address, Port number, Username and Password.

Click Scan Now.

This will automatically try all the different model listed in its database and if any work they will list them below.

Select one press Save, then back, then back again.