A barbershop app that users can log in and check the appointment status of barbers within a given radius. Users can see which barbers are in which barbershops and can view pictures of their work, give ratings, and leave comments. The users can view the time schedules of each barber they like and schedule an appointment which the barber will get a notification for. 15 minutes prior to the appointment time, a push notification will be sent to the user to confirm or cancel the appointment, and then depending on the response, the barber will be notified.
There are more details, but for now this is the overall idea.