How to import tasks from other apps to TickTick?
Sign in to TickTick on the web.
Click the avatar in the upper-left corner of your TickTick homepage, then click "Settings" from the menu that appears.
Click "Backup" in the left panel.
TickTick allows you to import tasks from other to-do apps, including Wunderlist, Omnifocus, Astrid, Toodledo, Springpad, and iCal.