The 7D 2020 Complete Guide is “available online as an ebook”:http://bookwalker.jp/pc/detail/e205dd12-45f2-4510-a88b-0658579f8a65/ if you have access to BOOK☆WALKER.

The app for Android is region locked, unfortunately, and the iOS app is only available on the Japanese App Store, so it’s basically a Japan-only thing for now.