The rules, written along the curb
Each block shows its sweeping days and times right on the map, in small type beside the curb. Zoom out and the street names stay, so you can find your block without hunting through pins.

Tap once where you parked
Drop the pin by the car, or tap the block itself. The app looks up the city's sign record for that side of the street and draws it as the sign you'd see on the pole, so you can check one against the other.

A heads-up the evening before
The card tells you when to move by and how long you've got. The reminder comes the night before, at 8pm or whatever time you choose. Moved the car? Tap the button and the reminders stop.

Holidays are already on the calendar
When the city suspends alternate side parking, the app knows and stays quiet. The calendar lists the days off and tells you which ones cancel your own sweep.

Yours, and nobody else's
There's no account to make and nothing to sign in to. The whole city's sign data ships inside the app, so the spot where you parked never leaves your phone. It works in New York City only, on iPhone.
Say hello
Found a block with the wrong rules, or something that could work better? Write it here and it comes straight to me.