I want to add a task and be reminded in 10 minutes quickly. Can I quickly add such thing by for example adding "call joe +10m"?
Reminders are a Premium-only feature. You can choose the default reminder method (email, SMS or mobile push notification) and each time you set a due time for a task (such as "today at 1pm" or "tom @ 13:45"), a default reminder will be set to "30 minutes before" the deadline.
Each reminder can be modified and in addition to relative reminders which require a due time for a task, you can set absolute reminders. These can be quickly added while typing a task by including: <remind tod @ 12:40> within the task name.
that is not what I meant. I wanted to see if there was a quick add action that would allow me to do a "in x minutes" type reminder. For example, I am using launchy to quickly add tasks, and I want to get a reminder in 10 minutes to call someone. So I would create a task "call joe +10m !p1", and then I want to get a reminder in ten minutes. Or ten hours, or ten days. If such quick action was possible, then upgrading to premium would be worth it to me, otherwise I will just stick to autohotkey, launchy and growl to accomplish the same, but it is not as elegant as todoist...
PS: kind of like "smartadd" in remember the milk...
Unfortunately, that's not possible in Todoist right now, but you're welcome to add a feature request to our Votebox: http://todoist.com/Vote/