KuuKla

The following description comes from the Google Play Store description of the app:

A perfect, user-friendly application designed for turning your tablet or phone to run “only your selected application” for a selected period of time.
Your everyday device is now a game-boy for your kid, or it can be an entertainment tool for your travel companion. You can Securely Share your device with your children or others.
Or you may want to turn a cost effective tablet to be your restaurant tablet showing only your beautiful menu’s with vivid colors for your customers.
How about turning tablets as kiosk for your shoppers in your retail business?
This application is also very convenient and effective platform for your android device to turn into be your own Digital Signage; in public or private events, retail stores, hotels, restaurants, buildings, and other locations (event programs, menus, general information, advertising and other messages)

Setup
Click on the KuuKla Application Icon
Simply select an application,
Set time period with slide timer bar,
Set your PIN code, (optionally email address for PIN recovery)
Then your device becomes an application appliance of your choice!

Compatibility 

All tablets and smartphones running on Android 4.0 and over
We are working very hard for adding more comprehensive functionalities into KuukKa, your feedback is very important for us to offer you a solution that will serve for your needs, please rate us and share your comments.