Test your beauty level is a joke app that supposedly measures your level of beauty.
The way Test your beauty level works is extremely simple: when you start the app you'll see a button that says 'Start the Test.' When you tap it – without needing to upload a photo, activate the camera, or anything – you'll see a beauty percentage. Obviously every time you tap the Start the Test button you'll get a different result, because beauty proper isn't actually getting analyzed here in any case.
Test your beauty level is a good app to play jokes on your friends by making them think beauty can be measured in percentages. Whatever result pops up falls entirely out of your control.