Flex: Workout Tracker & Log

The training app built for people who lift, run, and want everything in one place.

Flex logs every set, tracks your PRs, builds personalized workout and race plans, and keeps your training, cardio, nutrition, recovery, and Apple Health data connected — so every session has a purpose and nothing gets forgotten.

GET YOUR PLAN

• AI-generated plans for Strength, Hypertrophy, Fat Loss, Athletic, Mobility, and General Fitness
• Race goals for 5K, 10K, half marathon, full marathon, or custom distances
• Auto-generated running plans with weekly pacing, distance targets, and effort guidance
• Classic lifting splits: Push/Pull/Legs, Bro Split, and more
• Autopilot progression — weights update automatically as you get stronger
• Swap any exercise with one tap
• Import workouts from a photo or screenshot

LOG EVERY SESSION

• Set-by-set lifting tracker with rest timer and duration timer
• Superset support — group exercises and flow between them
• GPS cardio tracking with pace, distance, route, heart rate, and calories
• Start scheduled runs directly from your training calendar
• Live Activity on your lock screen and Dynamic Island during workouts and runs
• 500+ exercises with instructions and visuals
• Custom exercises — add anything that’s missing
• Notes on any set or session
• Workout calendar to schedule and review lift days, run days, or both

TRACK YOUR NUTRITION

• Log meals and snacks with macro and calorie breakdowns
• Barcode scanner for instant food lookup
• TDEE-based calorie and macro goals tailored to your body and goal
• Track water intake alongside your nutrition
• Recipes and saved foods for meals you repeat
• Nutrition quality scores and ingredient flags to help you understand what you’re eating

TRACK REAL PROGRESS

• Personal records, lift goals, and race goals tracked in one place
• Muscle balance radar chart — see which groups you’re neglecting
• Strength, volume, cardio, and activity trends over time
• Heart rate zones with zone-colored cardio graphs
• Cardio Load, Cardio Focus, and Activity Strain scores
• Bodyweight tracking and health metrics dashboard
• Apple Health imports with Health badges and duplicate prevention

TRAIN FROM YOUR WATCH

• Start lifts, runs, walks, rides, hikes, and rows from Apple Watch
• Log sets from your wrist and sync them back to the iPhone app
• Watch settings for units, auto-pause, splits, and audio cues
• Swipeable in-workout controls for Finish, Pause, Settings, Lock, and Splits
• Heart rate, GPS distance, calories, and HealthKit syncing

STAY CONSISTENT

• Morning sleep summary notification with sleep duration and score
• Workout logged confirmation notifications
• Workout streaks and badges to keep you motivated
• Milestones that reward consistency
• Shareable workout summaries and export graphics

TRAIN WITH OTHERS

• Share workouts with friends or the community
• Discover what others are doing for inspiration

PLUS: AI COACH

Ask anything — form tips, recovery advice, workout swaps, running guidance, or what to do when a movement hurts. Real guidance, right when you need it.

Try free for 7 days.

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