It's been a while since anyone added to this thread. But it seems like Todoist integration is so easy, so many applications have it. I love Diarium and just can't switch to Apple Journal because I'm cross platform. But I'm getting abandonware fears here. Diarium is just so good, I'd pay more if development can continue besides bug fixes. We really need some new up to date features and Todoist is such an easy one to implement.