In the first place, this book is to inspire technical-oriented cofounders of start-ups and existing business technical leaders seeking to integrate lead into their development operations. In addition, there are some Android and iOS code samples that we discuss to explain some of the concepts. Although the concept is more important than the code, you can try the sample for yourself. Where applicable, you can find a link to the Github repository, containing the code.
For the Android examples, you need to have Android Studio 3 (or above) and the Android SDKs installed on your computer. Android Studio is available as a free download for Windows, OSX, and other operating systems. The Android examples are written in Kotlin and Java.
The samples for iOS requires xCode 9 or above (xCode is available on OSX only and you need to have a paid Apple developer's account). The iOS examples are written in Swift 4.
Some examples require a (free) registration at Firebase, Facebook, Fabric, or other services.