Reviving an old thread here to say - we just shipped a feature related to this!
@while-loop put some work in to show tipping suggestions whenever you use your card at a restaurant that might ask for a tip!
You should already see this in your app - and it’s just the start of some of the tip tracking we’re hoping to build - so you know exactly what to tip (no more sneakily opening the calculator app 
) and so you’ll never get blindsided by a tip taking your balance lower than you expected.
We’re busy mocking up some future app screens - but would love to hear any more ideas you all have!