MyHealth In daily use · private
Fifteen years of my own data, in one offline app.
A native Mac app that bundles a meal picker, a set of long-range charts and a list of theories my own numbers disproved. Three tabs, no server, no network — everything loads from inside the app.
Fifteen years of weights, bloodwork and habits sat in exports that nothing could read together. The analysis that finally connected them produced a pile of HTML tools, and a pile of HTML tools is not something you open every morning. MyHealth makes them an app: one icon in the Dock, everything bundled, nothing phoning home. The most useful tab turned out to be the one listing the theories the data killed — the plausible stories that turned out not to be true of me.
- Pick a meal
- Custom entries
- An interactive meal picker
- Remembers what you ate
- Fifteen years on one timeline
- Nine curves, 2012 to today
- Theories my data disproved
- Daily weight: spikes vs. drift
- Seven deep-dive analyses
- The questions still open
- Runs entirely offline
- No network entitlement
- No server, no tracking libraries
- Everything ships in the bundle
- Sandboxed by default
- Three tabs, one icon in the Dock
- Charts drawn from scratch
- Swap the content, keep the shell
- Generated project, no checked-in Xcode
- A real app, not a folder of tabs
How it’s built
SwiftUI wrapping a web view, which is the whole trick: the analysis tools stay HTML — quick to regenerate as the data grows — while the shell gives them a Dock icon, tabs and a window. The Swift side is three small files and never changes; updating the content means replacing HTML and rebuilding. The Xcode project is generated from a spec file rather than checked in, and the icon ladder is rendered from a single SVG.
- macOS
- SwiftUI · WKWebView
- XcodeGen
- Offline-only
- Sandboxed
- Agentic engineering
Built for one user, and he is very demanding.
MyHealth is private — the data in it is mine and stays on my machine. The pattern, though, travels: bundle your own tools into a real app.