I wanted to work on something similar, so let me share my view:
I really like Trello, and my idea was an app where you had a different page per day (Today, Tomorrow, etc.) and you could import tasks from Trello. When marked as done on the app, the Trello card would be automatically moved from the "Todo" list to the "Done" list (or archived).
So you'd use Trello to enter all the stuff you planned to work on, and the app to schedule the when.
I never investigated the Trello API enough to know if this is feasible. But they have a writable API, so I think it's possible.
I really like Trello, and my idea was an app where you had a different page per day (Today, Tomorrow, etc.) and you could import tasks from Trello. When marked as done on the app, the Trello card would be automatically moved from the "Todo" list to the "Done" list (or archived).
So you'd use Trello to enter all the stuff you planned to work on, and the app to schedule the when.
I never investigated the Trello API enough to know if this is feasible. But they have a writable API, so I think it's possible.