I found a Bullet Journal app for my Android phone. I think it will prove to be very useful. Although in my opinion Bullet Journals work best when they are in a notebook. I have tried on a few occasions to keep a paper Bullet Journal. I really, really want it to work, but can’t. However the Bullet Journal app is different somehow, and I can’t quite put my finger on why, apart from obviously I don’t have to write, I just type. Or swipe.
Check it out if you have an Android phone. Because there is no iOS version that I’ve found. Syncing between phone and iPad would just be too good.