GLP-1 companion (iOS)
LeanDays
A companion app for people on GLP-1 medication — injection tracking, symptom radar, meal coaching, protein and weight-trend tracking, and a resistance-training plan.
A strong case study should explain the workflow, the constraints, and the product judgment behind the interface.
Primary metric
Furthest along of the new concepts
Product maturity
2/3 shipped signals
Role
Product design, clinical-review-informed feature scope, and full SwiftUI implementation.
Challenge
GLP-1 patients juggle injection timing, side effects, rapid weight change, and the muscle-loss risk of fast fat loss — usually across several disconnected apps with no clinical guardrails.
Approach
One SwiftUI app built around the medication: an injection log and reminder engine, a symptom radar for side effects, HealthKit-integrated weight trends, and meal/protein coaching aimed at preserving muscle — backed by a written clinical review.
Impact
The most built-out of a set of new product concepts, with real functionality standing behind the plan rather than a spec document.
Product snapshot
LeanDays
Product snapshot
Built around the medication itself, with meal coaching aimed specifically at preserving muscle during rapid weight loss.
Highlights
- Injection + symptom tracking
- HealthKit weight trends
- Muscle-preserving meal coaching