WhenLast is for keeping track of when you last did something. Do you know when you last fed the baby? Do you happen to remember the last time you drank an 8oz glass of water? When was the last time you walked the dogs or had a snack? What if it's been too long since you tweeted or partied hard? With WhenLast, you'll never have to rely on your own fault memory to keep track of what something last occurred.
Add new timestamps with the press of a button and delete them with a couple swipes of your finger. It's only as complicated as it needs to be. Which, as it turns out, is insanely simple.