A free app for Android, by Toast Inc..

TOAST POS SYSTEM APP is an application that lets you transact a customer’s payments. Point of Sale or POS is the most convenient way to record transactions and getting orders from customers because it has different features all in one application that eases your work load at all times. Moreover, it has a seamless and efficient interface that has different functions that allows you to execute transactions simultaneously, without breaking a sweat. 

The reason why this application is outstanding and reliable because this is widely used by different restaurants, cafes, clubs, and franchises. You can also request a live demonstration to elaborately learn and discover any features.