There are many issues with this app: 1. It has been unresponsive to me for months. It keeps showing that I have to wait numerous hours until I can use it again. 2. The few minutes that I once got every 9 or so hours were never enough. 3. The cost to buy a few minutes is ridiculously high... Im not sure why you would bother. 4. You could spend more time watching ads than learning.