Got one for ya.
Saved tip amounts. Kinda like presets on the radio.
I usually tip 1 cent, 2 cents, 5 cents, or 10 cents, for example. But others probably have different tendencies.
After I send the same amount more than once, ask me "Save this tip amount for your convenience?"
Then when I click Tip, those amounts appear as choices in a little pop up (with a pen / edit icon for editing my tip amounts if I so choose... and allow editing saved tip amounts in my settings)
But first fix the amou