There have been a lot of utility apps I’ve wanted to make, but I’ve developed an aversion to being responsible for people’s personal data. I’ve said a lot that I wish the government would provide personal storage for every citizen and that developers could write apps that would use that without ever having to have anyone’s data on their own servers.
Again, that’s not going to happen, so I’ve been looking around for something sort of like that, and the closest I can see is Dropbox. But then you have to make users sign up to Dropbox, and Dropbox is a typical foolish tech company that can’t just be OK with doing the thing it’s good at.