Cinder: AI Run Coach

Cinder is the run coach in your pocket — powered by AI, built for real runners.

Whether you're training for your first 5K or chasing a marathon PR — or taking on a 50 or 100-mile ultra — Cinder builds a personalized training plan around your goal, current ability, and weekly schedule. Then it adapts as you go.

SMART TRAINING PLANS Generate a fully personalized plan in seconds. Cinder schedules easy runs, long runs, tempo work, intervals, and rest days — all calibrated to your fitness level and goal race. Supports 5K through 100-mile ultra distances.

AI COACH CHAT Ask anything. Your AI coach knows your recent workouts, how you slept, your upcoming races, and your training history. Get real answers, not generic advice — and your conversation carries over every time you open the app.

GPS RUN TRACKING Track every run with precise GPS. See live pace, distance, and elapsed time on screen. Your full route is saved and viewable after every run — even with the screen off.

CINDER SCORE Each morning, log your sleep, energy, and stress. Cinder uses your daily score to adjust your workout intensity and warmup — so you train smart, not just hard.

ADAPTATION ENGINE Told Cinder your legs were dead after Tuesday's long run? Wednesday's workout adapts automatically. The plan bends so you don't have to break.

RACES NEAR ME Find upcoming races within 25 miles using live data. Register directly from the app.

SHOE TRACKER & RECOMMENDATIONS Log your running shoes and track mileage per pair. Get personalized shoe recommendations based on your training profile with direct shop links.

PROFILE & PERSONAL BESTS Track your training streak, total miles, time on feet, fastest mile, and longest run — all in one place.

MILESTONE BADGES Earn achievements as you build your streak, hit distance milestones, and reach new personal records. Twelve badges with animated celebrations.

RACE PREDICTOR Based on your training data, Cinder predicts your finish time for any race distance using the proven Riegel formula.

STRAVA INTEGRATION Connect Strava and your completed runs sync automatically — with distance, duration, and route.

Cinder is free. No subscription, no paywall, no account required. Your data stays on your device.