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Health and personal informatics

PaceTank

A Long COVID and ME/CFS pacing app that connects Apple Health data with lightweight energy-management models.

Founder and iOS Engineer2025
View on the App Store

What mattered

PaceTank is shown as a domain example, not the whole identity. It demonstrates how Ian applies mobile engineering to health and personal informatics.

The case study emphasizes privacy-aware mobile experiences, physiological data, and product sensitivity for people managing limited energy.

Stack

  • SwiftUI
  • Apple Health
  • Core ML
  • MLX
  • TelemetryDeck

Selected outcomes

  • Built the first Long COVID management app in this portfolio supporting Apple Health, reaching 140 users.
  • Created a custom on-device ML pipeline for energy management experiments.
  • Integrated event analytics to understand how people use pacing features.