Apps

Things I build for the iPhone

Certification practice with a tutor that runs on the phone rather than in someone else’s data centre. Writing tools for executives that never see a server. And the companions to the books. One principle runs through all of them: if the work can happen on the device, it happens on the device.

12 apps 2 on the App Store 7 submitted or in preparation

Certification

Executive tools

The book

Governance

Games

Why they all work offline

Every app here that reasons does it with Apple’s on-device Foundation Models — so a study tutor, a board memo, or a conversation with a simulated candidate never leaves the phone. There is no server to send it to, which means there is no server to breach, no data to sell, and nothing to train on. That constraint costs something: those features need an iPhone 15 Pro or newer on iOS 26 with Apple Intelligence enabled, and on anything older they report as unavailable rather than quietly falling back to the cloud.

Missing a certification you need, or want one of these on the iPad? Tell me and it moves up the list.