Hola,
I am expert Android developer and I can develop Android app for you perfectly.
As you mentioned there is intro screen, 2 other screens , and dialog boxes , I can develop all perfectly.
Yes, I can complete within 7 to 8 hours.
I have experience of adding Admob as well.
Please let me know what will be in other screens in App ?
I will provide you best service with fast communication.
Please send me a message so that we can discuss more,
Thanks,
Swapnil Chouhan