Vibration Reminder is a free Android app developed by YouWeDroid that vibrates the phone at specified time intervals. This app comes in handy when you're in a meeting or riding a bike and can't take out your phone frequently to check the time. You can set regular or custom time intervals at which the vibration reminders will go off.

One of the best features of this app is the option to configure vibration strength. You can choose the strength of the vibration that suits you the most. Additionally, you can create your own vibrating pattern to make it more personalized. This app is not only useful for keeping track of time but also helpful for those with ADHD to self-regulate their attention and focus.