Intervals.icu Companion

Intervals Companion is a powerful third-party companion app for Intervals.icu, bringing your training data to iOS, watchOS, and macOS with beautiful widgets, deep Apple Health integration, and advanced analytics.

Two-Way Apple Health Sync Automatically sync workouts recorded on Apple Watch or iPhone to Intervals.icu, and push Intervals.icu activities back to Apple Health to close your Activity Rings. Sync daily health metrics like HRV, sleep scores, and readiness scores between Apple Health and Intervals.icu, keeping all your data in one place.

Apple Watch Workout Sync Convert planned workouts from your Intervals.icu calendar and send them directly to Apple Watch so your structured sessions are ready to go when you are.

FIT File Import Manually import FIT files to Intervals.icu and/or Apple Health. Bring in workouts from any device or platform with a few taps.

Metrics & Custom Charts Build personalized charts and widgets across all fitness and health metric fields. Visualize the data that matters most to you, your way.

Library Browse your Intervals.icu workout library and add workouts directly to your training calendar from your phone.

Training Analytics

• Interactive Fitness, Fatigue & Form graph with drag-to-inspect for past activities and planned workouts
• Predict future form based on your scheduled training load
• Vitals tracking: HRV, readiness & sleep scores, resting and sleeping heart rates
• Distance splits and pace zone charts on activity detail screens

Chat & Community

• Send and receive private messages with coaches and athletes directly from your phone
• View and post comments on activities to stay connected with your training community
• Push notification alerts for new messages and activity comments

Widgets & Watch

• Home screen widgets for iOS, iPadOS, and macOS
• Apple Watch app and watch face complications
• Sports Summary widget: weekly goal rings for distance and time with customizable colors
• Silent push notifications trigger automatic updates when new activities or wellness data arrive on Intervals.icu

Intervals Companion is an independent hobby project, not affiliated with or endorsed by Intervals.icu. Fitness metrics and scores are for informational purposes only — not a substitute for professional medical or coaching advice.