ViewKeeper is an Android application developed by Lee Sang Gyun. This utility and tools program is designed to prevent your phone from going into sleep mode. With ViewKeeper, you can ensure that your phone stays awake and active, even when it is not being used.

The main feature of ViewKeeper is its ability to keep your phone's screen on indefinitely. This can be useful in situations where you need to continuously monitor or display information on your phone without any interruptions. Whether you are using your phone as a digital signage display, a media player, or for any other purpose that requires the screen to stay on, ViewKeeper has got you covered.

Furthermore, ViewKeeper is a free application, making it accessible to all Android users. It is a simple yet effective solution for those who want to prevent their phone from entering sleep mode and ensure uninterrupted operation.