Setup guide

Create Your Account

Sign up at trainstack.app with email or OAuth (Google, Apple). Your account creates a user identity for authentication and an athlete profile for your training data. Everything -- activities, health metrics, equipment -- belongs to your athlete profile.

Future support for coaching and family accounts means one user can manage multiple athletes, but for personal use it's one-to-one.

Connect Your Devices

Head to Settings > Integrations to connect your fitness devices and apps. TrainStack supports 17+ providers including Apple Health, Garmin, Strava, Whoop, Oura, Polar, COROS, and more.

Most integrations use OAuth -- you'll be redirected to the provider's site to authorize access, then sent back to TrainStack. Apple Health syncs through the mobile app via HealthKit.

Your First Sync

Once a provider is connected, TrainStack pulls your recent activity history. Depending on the provider, this includes:

• Activities -- runs, rides, swims, gym sessions, and everything else
• Health data -- sleep sessions, HRV, resting heart rate, readiness scores
• Daily metrics -- steps, weight, body fat, stress

The initial sync may take a few minutes for large histories. Subsequent syncs happen automatically in the background.

Explore Your Data

Your Activity Feed shows all synced activities with sport-specific cards. Click any activity to see detailed metrics, time-series charts (heart rate, pace, power), and GPS maps where available.

The Calendar view combines planned workouts, completed activities, sleep data, and daily metrics on a single timeline.