TrainerKit

Adaptive cycling companion: indoor trainer, outdoor GPS, and Apple Watch standalone rides with live AI coaching that learns your form and race calendar.

TrainerKit is an adaptive cycling companion for iPhone, iPad, and Apple Watch. Ride indoors with any FTMS smart trainer, outdoors with GPS, or standalone on your Apple Watch.

What's new in 4.0: Adaptive Training Intelligence brings daily training suggestions with AI coaching that reads your last ride and current form. A new 5-tab layout (Today, Ride, Workouts, Plan, History) keeps the essentials one tap away. Outdoor rides get a redesigned dashboard with a vertical metric roller: swipe to cycle Power, Cadence, Speed, Distance, and Climb or Descent at glanceable sizes.

Apple Watch gets big upgrades: standalone rides now pair power and cadence meters through watchOS Bluetooth Health Equipment (the same system Apple Fitness uses) for dramatically more reliable sensor data. A new dashboard metric roller cycles metrics via the Digital Crown. Five ride pages, 3-2-1 countdown, manual lap support, and dual-device safety in companion mode.

Key features:

• Adaptive daily suggestions with AI coaching
• Indoor rides with any FTMS smart trainer
• Outdoor rides with GPS, barometric altimeter, and Kalman-filtered track
• Enhanced race calendar with goals, registration, URLs, and GPX course preview
• Structured workouts indoors or outdoors
• Enduro ride mode with Liaison and Stage lap pairing
• Ride history with NP, IF, TSS, power distribution histogram, and route replay
• Manual lap support on every ride type
• Strava and Intervals.icu auto-upload with ride type picker
• iCloud sync across all devices
• Apple Watch standalone rides with HealthKit sensor pairing

Requires iOS 17 or later, iPadOS 17 or later, watchOS 10 or later.