Made an account just to make this comment. It's awesome that you put so much thought into protecting private thoughts. However, I think a password lock for the app is mandatory.
Thinking about my own automatic thoughts, I would hate it if, for example, I gave my phone to a friend or my girlfriend to check something out and they accidentally bumped on my private thoughts.
This makes me hesitant to use the app and it's a shame because I love the design and feel it would be very useful against that pesky automatic thinking.
This is something I’m kind of “working towards” incrementally. It’s on the road map, but I haven’t quite figured out all the details yet. You need a settings screen and a in app alert box to do it correctly, so recent updates were tackling how to fit those into the design well.
In the meantime, I swapped the labels of the buttons to be “alternative thoughts” which, by definition, are a lot more rational and hopefully less sensitive.
IMO it shouldn't contain that feature. There are high quality apps for locking access to apps with loads of functionality and customization this developer simply won't be able to match, because it deserves a whole app on its own. Why not use these?
iOS perspective: Because apps can‘t have this far-reaching permissions on other apps (and, adding my 2 cent, that‘s one of the reasons I still stick with Apple, even though their hardware and software quality is steadily declining).
