The most interesting aspect of making the owner apps, was the process itself.
Lean and Agile
We adopted a loose interpretation of a Lean UX approach, combined with selected Agile practices. This served us very well during the project. It ensured that we arrived at milestones ahead of schedule, and allowed the cross-discipline and multi-timezone team enjoyed working together immensely in creating a product we were justifiably proud of.
To test design solutions, I spent much of my time making mobile prototypes. This enabled me to directly observe users interacting with the app, providing feed for the next iteration. Working through these iteration cycles, led to increasingly higher fidelity prototypes. These served as useful documentation for the finished artwork, once handed over to the dev teams.