A while back we introduced you to Ian Fieggan (aka Professor Shoelace) who gave us a primer on the science of lacing sneakers (check out the full feature here). Now Ian’s vast library of shoe lacing techniques has come to the iPhone and iPod touch. Ian’s Lace App bundles together his complete library of 97 different lacing styles. All of the how-to instructions are included in the App itself, so there’s no need to connect to the internet to access any of the info. To download Ian’s Lace App head on over to Ian's Shoelace Site.