Every time when I edit a task, I automatically want to "SAVE" it.

Intuitively, I am clicking on the "bottom right" button, but for ANY.DO this button is "MARK AS DONE"!!!

Yes - it's nice that the app "auto-saves" things - but this is not intuitive at all.

Please change you put the "mask as done" button elsewhere and just add the "save changes" button? (even though the app would STILL auto-save changes).