🏅 Sports & Fitness · C4 Architecture · Pro
Fitness Tracking App Architecture
A fitness app backend: workouts, wearable sync, personalised plans, challenges and subscriptions.
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Drawing diagram…
What this diagram shows
- Wearable data syncs from Apple Health and Google Fit
- Plans adapt to each user's progress
- Challenges and leaderboards keep users engaged
Prompt used
Fitness app architecture: users log workouts in a mobile app, and health data syncs from Apple HealthKit, Google Fit and wearables. Services: workout logging, a plan engine that personalises weekly plans, challenges and leaderboards (Redis), and subscriptions through app store billing. Data in PostgreSQL, events to an analytics pipeline.
Mermaid code
C4Container
title Fitness Tracking App
Person(user, "User", "Tracks workouts")
System_Ext(health, "Apple Health / Google Fit", "Steps, heart rate")
System_Ext(stores, "App Store Billing", "Subscriptions")
System_Boundary(fit, "Fitness Backend") {
Container(app, "Mobile App", "Swift / Kotlin", "Workouts and plans")
Container(api, "API Gateway", "Node.js", "Auth and routing")
Container(workouts, "Workout Service", "Go", "Logs and history")
Container(plans, "Plan Engine", "Python", "Personalised plans")
Container(social, "Challenges Service", "Node.js", "Leaderboards")
Container(subs, "Subscription Service", "Node.js", "Entitlements")
ContainerDb(db, "Fitness DB", "PostgreSQL", "Users and workouts")
ContainerDb(redis, "Leaderboard Cache", "Redis", "Rankings")
}
Rel(user, app, "Uses")
Rel(app, health, "Syncs data")
Rel(app, api, "Calls", "HTTPS")
Rel(api, workouts, "Routes")
Rel(api, plans, "Routes")
Rel(api, social, "Routes")
Rel(api, subs, "Routes")
Rel(subs, stores, "Validates receipts")
Rel(workouts, plans, "Progress")
Rel(workouts, db, "Stores")
Rel(social, redis, "Scores")Related templates
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