Support multiple calendars: Dandelion To Do app is support three kinds of calendar in order to fully covers all of user’s needs. Gregorian-Shamsi-Hijri are three calendars which we support. iCloud support: One of the most important features for a task manager app is the ability to access to tasks from different devices. So Dandelion To Do has came to answers to all users requirements and it support backups with iCloud accounts then you can access to your tasks from different apple devices.