SF Parking Sucks!
ParkSF: Save your spot. Get alerts. No more tickets.
This app allows for you to check the San Francisco parking regulations in a specific location, and schedule alerts telling you to move your car when you are going to violate them.
To start, you create a profile for your car. You can name your car "Car Name" then hit submit. Then, you can select a location on the map and click the park button (icon in middle). This will take you to the alerts page, where you can see alerts for this location and schedule additional custom notifications as you see fit. Finally, there are the settings, where you can schedule early alerts and alter the identifying information for your car.