iAgenda Pro (Edited by Moderator - no external links, please read the forum rules.) has gone free:
iAgenda Pro is to schedule your activities with short task durations from minutes to days, which helps to visualize and maintain schedule in Gantt chart, with high operation efficience by intuitive gestures and well designed modern UI. You can easily create multiple agendas, lay out tasks on timeline, maintain task properties and operation on a clean interface.
iAgenda Pro is also able to share agendas as image, PDF and Microsoft Excel files via Email, Box cloud, iTunes and Photo album. You can also sync agenda across multiple iPads and teams via Email , Box Cloud and iTunes by importing and exporting functionalities.
Feature video is at https://www.youtube.com/watch?v=Ux7Qh5M5Yjs