I've been using Notability on my ipad for almost 3 years now and I like it but..... I'd really love a todo type feature (where I can type tasks and check them off) and I'd really really like a notebook that looks like a notebook! Does anyone remember the old Lotus Organizer? It actually looked like a day timer or planner on the screen and I've always felt the ipad would lend itself well to that. Unfortunately my brain lends itself well to that and I can't seem to find it. I'd downloaded and discarded many apps except for Notability but I'm almost at the point where I want to pick up pad and paper again for one job. I bought Opus Domini in the spring and it's oh so close to what I want. But no real note taking section. I'm really trying to incorporate a todo list, calendar and notes into one app with tabs. I am running iOS 7 and Mountain Lion. My Mac will likely be replaced before my mobile devices. A Mac version is nice but not a deal breaker.