I have three teens and loved this app when they were new drivers. Got woken up tonight by an alert that one had left home. FREAKED OUT! Went and looked... everyone is in bed. Sat up about 45 minutes calming my racing heart and got the alert that they were back at home. Definitely not reliable. Glad it woke me up though, someone would've been in huge trouble had I seen that "trip" and believed the app to be accurate!