On Android, GM's Maven car-sharing app (similar to ZipCar) does not run unless all permissions are granted, which include the ability to manage phone calls. Th

On Android, GM's Maven car-sharing app (similar to ZipCar) does not run unless all permissions are granted, which include the ability to manage phone calls. The Chinese WeChat messenger also refuses to run unless location access is granted, even though messaging apps do not depend on location to work. This type of behavior makes fine-grained permissions systems not very useful. It should be prohibited by the Apple App Store and Google Play Store.