Whistle is your intelligent fitness planner that builds personalized workout schedules in seconds — for any goal, any schedule, and over 80 sports. Whether you’re training for a triathlon or just want to stay active, Whistle adapts to your day, energy, and environment.

PLAN SMARTER, NOT HARDER
Generate full weekly workout plans or quick one-off sessions tailored to your goals, time, location, and even the weather.

TRAIN YOUR WAY
Supports 80+ sport types, from strength and HIIT to running, yoga, swimming, climbing, skiing, and more.

WORKOUTS ON YOUR WRIST
Send your workouts straight to Apple Watch for easy tracking, voice cues, and heart rate insights.

BUILT FOR REAL LIFE
Reusable templates, a memory system that learns your style, and natural language input make planning effortless. Just say “A 45-min run on Friday and full-body strength on Sunday,” and Whistle gets it done.

PRIVACY-FIRST DESIGN
No account required. Your data stays on your device or iCloud. AI features are opt-in, privacy-respecting, and processed securely. Health Data is accessed through HealthKit.

Whether you’re a beginner or a seasoned athlete, Whistle makes fitness planning frictionless — so you can focus on moving, not managing.