@schuppenvogel not an app and not a real solution but i maybe have two alternatives if you don't find the real deal1. i measure small things like my drug consumption (yeah, bad stuff, but it's just an example) in a spreadsheet2. if it needs to be an app: there are online wysiwyg drag and drop app creation tools, where you need little to no programming skilsi played around with the MIT app inventor a few years ago - create your app and use a local (on your phone) sqlite database to store the datahttps://appinventor.mit.edu/