Google added Tasks to its Gmail service not too long ago. Tasks is essentially an online To-Do app and list manager that works with Gmail. Now they’ve made Tasks accessible as a mobile webapp for iPhone and Android phones. Just navigate to gmail.com/tasks, and a mobile-friendly version will appear. You can bookmark it to the iPhone’s home screen, and it will have its own Tasks icon.

You can create and edit new tasks, check them off, delete, clear completed tasks, and organize tasks into different lists.

Tasks iPhone Webapp

Deleting Tasks on iPhone Gmail Tasks

Link:

Announcement on Official Gmail Blog.