Build A Fitness Bodybuilding App

We are looking to have a bodybuilding app made for Android and iOS. The main functionality will be a daily trainer where each day there is a video and then a set of exercises that the user must follow and record the weights they lifted and the number of reps. We have found a very similar app to what we are looking for here: https://play.google.com/store/apps/details?id=com.trainer.kagedmuscle&hl=en&gl=US. Please look at this to understand the kind of thing we are looking for. Apart from what you see in this example we would also like a static store section where we can add products and if someone clicks on one of the products it just goes to a page on our website for them to purchase.