Comparison

Gym Log vs Flex

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gym Log

Features
Read full description

Workout Day is a beautiful and intuitive workout tracking app designed to help you stay motivated and achieve your fitness goals. Features: Track Your Progress: Monitor your workout volume with detailed charts and statistics Weekly Achievements: Get motivated with personalised achievements and milestones Comprehensive Exercise Library: Access a wide range of exercises across different muscle groups Clean & Modern UI: Enjoy a beautiful, user-friendly interface that makes tracking effortless Flexible Units: Switch between metric and imperial measurements Visual Progress: View your progress through intuitive charts and graphs Quick Entry: Log your workouts quickly and efficiently Getting Started 1. Download the app from the App Store 2. Start logging your workouts 3. Track your progress and achievements 4. Stay motivated with weekly goals and milestones Privacy Workout Day respects your privacy. All your workout data is stored locally on your device and is never shared with third parties. Support If you have any questions or feedback, please reach out to us through the app's support section. Made with love for fitness enthusiasts

About

Flex

This app logs every workout set, tracks personal records, and generates personalized fitness plans. It also offers nutrition tracking, progress insights, and an AI coach for guidance. Stay motivated with streaks and badges, and share your progress with others.

Highlights
  • AI-generated workout plans
  • Set-by-set tracking with rest timer
  • Superset support
  • GPS cardio tracking
  • Nutrition logging with macro breakdowns
  • Personal record tracking
  • AI coach for fitness advice
Features
Read full description

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. --- Privacy Policy: https://tryflexapp.com/privacy Terms of Use: https://tryflexapp.com/terms

Screenshots

Gym Log4 screens
Flex4 screens

Verdict

The call

The clearest difference is in-app purchases: Gym Log at none against Flex's 3. Gym Log also leads on ads (none vs shown). Flex's advantage is update cadence (every 10 days vs every 5 months) and iOS requirement (16.4 vs 18.2). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flex sells 3 in-app purchases, starting at $4.99 per month. Gym Log asks for nothing beyond the download.

UpkeepUpdate frequency

Gym Log ships an update every 5 months, Flex every 10 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Gym Log versus Flex: the parameters behind the verdict, then further details
ParameterGym LogFlex
PriceFreeFree
Rating—5.0 (6 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—6 — better
Update frequencyEvery 5 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS18.216.4 — better
Further details — not scored
Size6 MB107 MB
Age rating4+4+
DeveloperJames ButlerCHRISTOPHER LAWRENCE BAGNELL

In-app purchases

None

Gym Log

No in-app purchases

3 purchases

Flex

Subscriptions2
  • Flex Pro Monthly7 Days trial$4.991 Month
  • Flex Pro Annual$29.991 Year
One-time1
  • Flex Pro Lifetime$149.99

Questions

Is Gym Log free?
Gym Log is free to download, with no in-app purchases.
Is Flex free?
Flex is free to download, with in-app purchases available.
Do Gym Log or Flex have ads?
Flex shows ads; Gym Log does not.
Which is updated more often, Gym Log or Flex?
Gym Log ships an update every 5 months, and Flex every 10 days. Most recently, Gym Log was updated on October 25, 2026 and Flex on October 31, 2026.

Other comparisons