i-Smart Viewer Plus is a free Android application that allows you to monitor your DVR system in real-time. This app is developed by GnetSystem and is exclusively designed for Gnetsystem products. With i-Smart Viewer Plus, you can access your DVR system and view live monitoring with screen divisions of 1, 4, 9, or 16. You can also zoom in and out using the pinch zoom feature.

The app offers PTZ, sensor, and alarm control, which gives you complete control over your DVR system. Additionally, the DVR push alarm feature sends you notifications when there is any activity in your DVR system. You can capture still images and videos of the monitoring footage directly on your smartphone. Moreover, the app offers frame move and speed control playback features, which allow you to easily navigate through the footage.

Overall, i-Smart Viewer Plus is a reliable and user-friendly app that provides all the necessary features for real-time monitoring of your DVR system. However, it is important to note that this app is only compatible with Gnetsystem products.