This app would be a pretty great app considering it’s entirely free, but there is a fatal bug which renders the app inoperable. In the metabolism section, if you edit daily caffeine limit by deleting the existing numbers, it will crash the app. This might occur the second time you edit it, but I’ve replicated this 3 times. The worst part is that once you crash it this way, the app then crashes on startup and will no longer work until you delete and reinstall it. At that point you’ve lost all your drink data.