Inspiration
An inhaler I've been using lately for allergy-related asthma symptoms has been bothersome lately. I'm supposed to use it when I have a coughing fit, but cannot use it for another four hours. I've been having a lot of trouble keeping track of when it can be used and when it can't. I reasoned that other people using similar kinds of medicines must be having similar issues.
What it does
A button in the app, when pressed, records the date and time. After a specified amount of time, the app creates a notification on the lock screen to tell the user the medicine is available.