i-Smart Viewer is a free Android application designed to offer real-time viewing of a DVR system. It is developed by TibetSystem and is available to all Android users. The application provides access to a DVR system, allowing users to live monitor their systems with a 1/4 screen division. Additionally, users can capture still images in their smartphones with ease. However, it is important to note that this application is only compatible with TibetSystem products.

Overall, i-Smart Viewer is a useful application for those who own a TibetSystem product and want to monitor their DVR system in real-time. The application's features are simple, yet effective, making it easy to use for all users. The only downside is the limited compatibility, which might exclude some users from taking advantage of this application.