Blocks and Component Reference
appendix A Setting Up Your Phone and Computer
appendix B Creating Your Own TinyWebDB
Part III contains some important reference materials, starting with the Blocks and Component Reference. This is not a comprehensive reference: Instead, it explains the most important and most complex blocks and components in App Inventor.
Appendix A tells you how to set up your phone and computer to get started with App Inventor, and Appendix B shows you how to set up your own TinyWebDB Service.