ScrubAlert is a free, non-profit utility designed to remind you to wash your hands after reaching a specified number of steps. Available in over 30 languages and completely open source, it can also be used to prompt hydration at set intervals.

Unlike a simple timer, ScrubAlert utilizes step count as a more accurate measure of bacterial exposure. This unobtrusive solution aids both children and adults in practicing proper hand sanitization techniques to fend off harmful germs.

Leveraging the health app's pedometer, the app has minimal battery impact by checking steps every 15 minutes in the background and sending notifications when needed. It operates offline and doesn't store any user data. Additionally, a built-in 20-second timer encourages thorough hand washing practices.