The app could be used to implement concepts and techniques described in the book Getting Things Done by David Allen.

[4] In 2015, Premium and Platinum subscription plans were introduced (while maintaining the free user version).

Users may have had utilized GTD lists, such as Inbox, Actions, Projects, Someday, Ticklers, and Reference information to process their Inbox items into relevant GTD lists.

IQTELL features included email, calendars, contacts, list management, sharing and collaboration with team members.

All of the features were compatible with commonly used organization software such as Evernote[11] and iCloud.