A locking mechanism / code to unlock
It can be an uneasy feeling to leave your laundry unattended at the laundromat; yet sometimes you cannot spend hours waiting around. I envision a locking mechanism where through the app, a code is generated to secure the unit and then a separate code for unlocking once the cycle is complete. This would give users a sense of freedom to come and go-
Units (washer/dryer) are numbered already - assign your name to a unit, receive a code through the app to enter the unit to lock and a second code to unlock. Peace of mind!