Is there a nice one click alarm for android? Sometimes when I'm tired, I take a nap of 1 hour. Doing that with the native clock on Android requires a lot of clicks. I would like to have an app that whenever the button is pressed, it starts to count 1 hour.
It sounds like what you want is a timer rather than an alarm clock. (Did you look in the Play Store?)

One very simple timer app I use is Tick!. 


Tap to open
Use your finger to spin the dial to the amount of time you want to count down
Tap to start the timer