Once again a wonderful example of something incredibly simple but incredibly useful. This would be particularly beneficial for Crossfit style workouts that are closely linked to a timer and where there is a different set of exercises every single day.
Brilliant!
I made an app called RipDeck based on the deck of cards workout that is great for providing variety to your routine.
We have a weekly featured deck or you can create custom decks. Great for bodyweight exercises. Give it a try. https://itunes.apple.com/us/app/ripdeck/id409921624?mt=8
The featured decks are available on the site if you want some workout ideas for use with a regular deck of cards. http://ripdeckapp.com