This app is the simplest way to keep track of scores, guaranteed! You can create a new scorecard in seconds and share it with other people, all without having to install anything anywhere.
There are of course already a large number of native apps (for iOS and Android) available that allow you to track scores. However, they all suffer from a fundamental shortcoming: it's very hard to share the soreboard or collaborate. Sharing on the web, however, is extremely easy: you just share a URL.