A few people have requested that I add a feature to PackRat that let’s you set a reminder in x number of minutes. Although it’s not apparent, you can already do that and it works just like Backpack (see here).
PackRat works in much the same way. Just start the reminder text with a followed by the number of minutes or hours and minutes in hh:mm format. The and time will not be added to the reminder text and your reminder will be scheduled in the specified time from now. You can also just enter a time like 1:30pm.
I’ll probably make this more apparent in a future version, but for now this is a quick way to do it.