i-Smart Viewer Plus is free application to realtime view of DVR system. Features of SMART DVR Viewer. Access to DVR. live monitoring: 1 / 4 / 9 / 16 Screen division. Pinch Zoom. PTZ, Sensor, Alarm Control. DVR Push Alarm. Capture the still image and video in the smartphone. Frame move, Speed control Playback. Apply only to Gnetsystem product. Gnetsystem Co., Ltd.