15 Kilometervisit 15kilometer.de
Find your radius of movement
Due to rising numbers of Corona infections in Germany the federal government ordered everyone in regions above a certain threshold to not leave a radius of 15 kilometers from their place of residence. As this was announced, some friends and I immediately came up with the idea to build a simple website to not only check one's own allowed radius of movement but also if it overlaps with the one of a friend or a relative.
We launched it the day after the decree was announced.