Flex: Workout Tracker & Log
Track Lifts · PRs · AI Coach
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
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.
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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
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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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Privacy Policy: https://tryflexapp.com/privacy
Terms of Use: https://tryflexapp.com/terms
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Referral Program & Rewards — Flex now has a referral program. Invite friends using your personal link or code, and earn rewards as they join, including exclusive accent colors and app icon options that aren't available to everyone. Rewards unlock automatically as your referrals hit each milestone, and anything you already had selected before it became exclusive stays yours.
Custom Accent Colors — A new accent color picker in Appearance Settings lets you personalize Flex beyond the default orange. Some colors are unlocked immediately, others unlock through the referral program above.
Shareable Workout Codes — Workouts, plans, and sessions can now be shared with a simple code instead of just a link. Enter a friend's code to preview their workout, plan, or session before adding it to your own, and shared codes now expire after a set time instead of staying valid forever.
Redesigned Share Cards — The workout and activity share experience has been rebuilt with a full-screen editor and a proper template system, so you can pick a layout and style before sharing instead of getting one fixed card. Sharing is also easier to trigger — take a screenshot of a workout summary and Flex will offer to turn it into a shareable card.
Warm-Up & Cooldown — Flex now builds a smarter warm-up based on the muscles your workout actually targets, instead of a single random warm-up movement. A cooldown has also been added after both lift and cardio sessions.
Autopilot Improvements — Autopilot no longer tries to add weight to bodyweight exercises — it recognizes them automatically. You can also mark any exercise to "Hold Weight," which pauses Autopilot's weight increases for that exercise while still tracking your performance. Suggested weight increases are now rounded to realistic increments based on your equipment (5 lb for barbells, machines, and dumbbells; 2.5 lb otherwise).
Apple Watch & Live Activity Sync — Fixed several issues where the Watch and iPhone could fall out of sync during a workout: timers on the Watch no longer drift from your iPhone, the Watch now returns to your workout automatically if your screen sleeps mid-set, and the Live Activity now properly ends the moment your workout finishes instead of lingering on screen. Workout completion is now handled as one coordinated step across both devices.
Liquid Glass Design Upgrade — Buttons and the navigation bar now use Apple's real Liquid Glass material on supported devices, replacing the earlier approximation, so Flex's controls look and feel more consistent with the rest of iOS. The back button's arrow has also been re-centered.
Various Bug Fixes & Improvements
The developer, CHRISTOPHER LAWRENCE BAGNELL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- CHRISTOPHER LAWRENCE BAGNELL
- Size
- 102.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.5 or later.
- iPhone
Requires iOS 15.5 or later. - iPod touch
Requires iOS 15.5 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 26.4 or later.
- iPhone
- Location
- This app may use your location even when it is not open, which can decrease device battery life.
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Flex Pro Lifetime USD 149.99
- Flex Pro Monthly USD 4.99
- Flex Pro Annual USD 29.99
- Copyright
- © 2026 Blockchain Bay
