Rattie is a SwiftUI app built for — and winner of — Apple’s Swift Student Challenge 2026. I built it because I have eight pet rats and couldn’t find a decent health tracker for them — so I made one in a weekend and it won an award.
It manages the full health record of a mischief of pet rats, with a unified timeline, auto-generated care checklists, and Squeaks — an on-device AI assistant powered by Apple’s Foundation Models framework.
All data stays on-device. No account required. No tracking.