Came across Sworkit
a few days ago.
You punch in how much time you have, from 5 to 60 minutes, and what you want to work on and it will give you a workout routine. Say you only have 5 minutes and want to work on flexibility. It will sequence out 9 stretches, plus a 30 second break in the middle.
Also have an iPhone
and Android version
. I've been using the Android one for a few days, and it's way easier to deal with a phone than the website.