The tasks feature, which you need to pay for, is very limited. I bought a year subscription for this feature, so the fact that you cant
--- schedule several work sessions for the same task (they appear as new tasks and can only repeat indefinitely)
--- schedule work sessions for your task specifically
--- Have multiple levels inside a project (paper > write methods section > outline, check references, revise based on comments)
--- Sync your tasks across multiple devices (your tasks arent saved to a cloud account like iCal, which is the only way to sync currently.)
Means I wasted my money. Stick with the free version. The features they want you to pay for are not well developed.
AlliesTheBest about Planner Pro - Daily Planner, v3.4.2