Are "bring your own storage" apps a thing?I'm being inspired by draw.io, a web app for creating diagrams. Notably, it's not crammed with useless information and the user remains in charge of their data. A diagram can be stored as a file to your local device, Dropbox, Google Drive, OwnCloud or any other similar service.In contrast, let's look at MyFitnesPal. Upon opening the app I'm faced with news, cookie confirmation dialog and sometimes promotional pop-ups. All this to simply input my body weight.If MyFitnesPal followed a draw.io model, it would be a simple app with a couple of .csv files as a backend.Is there a market opportunity for new breed of apps that are:
 - minimalistic in design and features
 - user remains in charge of the data by using text files as storage and by giving them a choice on where to store themWhere do I find people who think alike?