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# Uncle Rudy

> A focused iOS 27 accountability app that puts nearly every major capability of the platform to work in one place, entirely on device.

Uncle Rudy caps each day at five tasks and pairs them with a character who holds you to them. It was built as a broad, production integration of iOS 27: a custom model trained with MLX and run through Core AI, control of the whole app through App Intents and Siri, Foundation Models for personality and vision, widgets and Live Activities — with almost everything running on device.

## Building Uncle Rudy on iOS 27

The engineering deep-dive, section by section (https://unclerudy.app/blog/building-uncle-rudy-on-ios-27):

- [01 · Overview — An app built around accountability](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#overview)
- [02 · The five, and focus — Five tasks. That is the whole rule.](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#the-five)
- [03 · The integration at a glance — Uncle Rudy and iOS 27, a system-level integration](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#integration)
- [04 · On-device intelligence — Core AI and MLX: our own model on the phone](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#on-device)
- [05 · Foundation Models — Personality, vision, and memory](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#foundation-models)
- [06 · Siri and App Intents — Running the entire app without opening it](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#app-intents)
- [07 · System surfaces — Present on every surface, in Liquid Glass](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#system-surfaces)
- [08 · Privacy architecture — On device by default, Private Cloud Compute where it earns its place](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#privacy)
- [09 · Accessibility — Usable by the people who need it most](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#accessibility)
- [10 · The wider view — Why this matters for the platform](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#wider-view)
- [11 · What is next — Where we are taking it](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#what-is-next)
- [What we learned — What building it actually taught us](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#what-we-learned)
- [12 · Conclusion — Built to show what iOS 27 can do](https://unclerudy.app/blog/building-uncle-rudy-on-ios-27#conclusion)

## Other pages

- [Home](https://unclerudy.app/): product overview and App Store link
- [Privacy Policy](https://unclerudy.app/privacy): no accounts, no cloud sync, nothing sold
- [Terms of Use](https://unclerudy.app/terms)