Take a look at our ‘Egg Clock’ which allows you to set custom times
I've created an idea to add this functionality on iOS.
If you'd like to see this happen please upvote at http://ideas.flic.io/forums/283403-flic-ideas/suggestions/13855068-set-a-timer-for-a-defined-duration-on-ios
I'd use this as a kitchen timer to remind me when my egg was cooked or tea brewed. I'm sure other people would have lots of uses in fitness/exercise, studying etc.
Note: it looks like this action was recently added for Android and I wanted to make sure that iOS was still on the radar. http://ideas.flic.io/forums/283403-flic-ideas/suggestions/7178236-set-a-timer-to-a-defined-time-e-g-20-minutes-1