RunIntensity

Know whether to push or recover the moment you wake up. Now w/. friend leaderboards, challenges, and a 7-day free trial of Coach Brady (your AI running coach)

RunIntensity calculates your true training load using Stress-Adjusted Miles (SAM) — a 5-factor model that accounts for heart rate intensity, terrain, surface, cumulative fatigue, and environmental stress. Stop guessing how hard your runs really are.

WHAT MAKES IT DIFFERENT Most running apps track distance and pace. RunIntensity goes deeper. A hilly trail run in the heat stresses your body far more than an easy road jog — even at the same distance. SAM captures that difference so you train at the right load every day.

KNOW WHAT TO DO TODAY The readiness-first "Today" home gives you one clear answer every morning: push or recover. Readiness score, today's planned workout, your weekly training budget, and a one-tap start — all at a glance.

HOW IT WORKS RunIntensity reads your Apple Health data — runs, heart rate, HRV, resting heart rate, sleep, and weight — and computes a daily readiness score and weekly SAM budget. No manual logging. No wearable lock-in. If your watch writes to Apple Health, RunIntensity can use it.

FREE FEATURES

• Stress-Adjusted Miles (SAM): the real cost of every run
• Daily Readiness Score from HRV, sleep, resting HR, and recent load
• Readiness-first "Today" home with weekly SAM goal and streaks
• Home & Lock Screen widgets, plus Siri ("What's my readiness?")
• Training planner with periodization (base, build, peak, taper, recovery) and race milestones
• Personal Records and a Lifetime Bests trophy case
• Body soreness tracker (36 regions)
• Shoe mileage tracking with retirement alerts
• Live Activity on the Dynamic Island during Apple Watch workouts
• The science behind every calculation — no black boxes

TRAIN WITH FRIENDS — FREE

• Follow friends' readiness, SAM, and workouts
• React and comment on the social Board
• Weekly leaderboards and head-to-head challenges (SAM or miles)
• Streaks and momentum badges

COACH BRADY — YOUR AI COACH ($19.99/year, 7-day free trial)

• Chat about your week, your goals, and how to train
• Advice grounded in your own readiness, SAM, and history
• Automatic weekly workout planning
• Web coach dashboard from any browser

COACH MODE ($39.99/year) Everything in Coach Brady, plus manage unlimited athletes and groups, assign periodized plans, and compare athletes side by side.

PRIVACY FIRST Core calculations happen on your device. RunIntensity reads Apple Health but never writes to it. No ads. No third-party tracking SDKs.

REQUIREMENTS iPhone with iOS 17 or later. Optional Apple Watch (watchOS 10+) for the Race Pace timer and Live Activity. Apple Health data from any GPS watch or phone workout.

Subscriptions are auto-renewable yearly, charged to your Apple ID. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.zerodi.net/runintensity-privacy