Each section is one screen of the app, with its parts named so you can refer to them (for example "Home B but with the week card from A"). Pick one version for each screen and write what you would change; you can mix them (for example Home from B, Start from A, the exercise page from C). Every phone is live: tap through it. The 3D coach shows as a still picture here to keep the board light; it is live in the full prototypes.