Potty training is mostly a test of adult endurance, but Daniel Tiger's Stop & Go Potty helps with the trickiest part for toddlers: stopping whatever fun thing they are doing the second they feel the urge.

The app lets kids play basic mini-games with Daniel or Katerina—building blocks, painting, or playing in a water table—until the character signals it's time to go. The child taps the potty icon, walks them through wiping, flushing, and washing hands, and then returns to the exact same game right where they left off. That loop proves to toddlers that stepping away to use the bathroom doesn't mean their playtime vanishes.

At a couple of bucks with no ads, no hidden purchases, and zero stress, it is a quiet, reliable tool from PBS KIDS that does one useful job well.