Making parking tickets a thing of the past is the goal of the SpotAngels app. The app offers information on parking spots in 25 different cities. This info includes if a spot is free or metered. Further, the app sends an alert if your car is about to be ticketed, say for a street sweeping violation. The SpotAngels app's creators say that on average users save about $100 a year in tickets.
The SpotAngels app also features a crowdsourced function similar to Waze's driver-sourced traffic info. Members of the community can add information on parking spots (photos with tags and a brief description), ensuring that the app is as up-to-date as possible. The SpotAngels app is currently available for both iOS and Android.