App
FiftyByFifty
FiftyByFifty is a phone-first map for the classic goal of setting foot in all 50 US states before your 50th birthday.
Tap a state to mark it visited, then add the trip date, notes and before/after photos, and watch your progress and birthday countdown climb toward a Finish Line celebration at 50/50.
Under the hood
Your map stays private until you share it: an unlisted link lets family and friends view and like it, read-only, and you can switch the link off anytime.
It also connects to RevelRoad Trips. Pick the states you still need, tap Send It, and get a road trip planned through them.
It's live now and free to use, with no sign-up needed (you can link a Google account to keep your map across devices).