Comparison

Flexer vs Built Workout

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

Head to head
About

Flexer

This app makes tracking gym workouts engaging and simple. Log sets, reps, and weights effortlessly, access a large exercise library, and visualize your progress with charts. Gamified elements like trophies and streaks keep you motivated to achieve your fitness goals.

Highlights
  • Vast exercise library with instructions
  • Effortless workout logging
  • Progress visualization with charts
  • Gamified fitness experience
  • Trophy and streak system
  • Personal record tracking
Features
Read full description

Get addicted to working out. Flexer revolutionizes your gym experience, transforming fitness tracking into an engaging and rewarding journey. With its sleek, intuitive interface, Flexer simplifies the entire workout process, making it accessible for beginners and indispensable for seasoned lifters alike. Vast Exercise Library: Access over 300 expertly curated exercises, complete with detailed instructions and muscle targeting information. Whether you're into powerlifting, bodybuilding, or general fitness, Flexer has you covered. Effortless Workout Tracking: Log your sets, reps, and weights with just a few taps. Flexer's user-friendly design ensures you spend less time on your phone and more time crushing your workout. Progress Visualization: Watch your fitness journey unfold with beautiful, easy-to-understand charts and graphs. Track your personal records (PRs) for each exercise and see your strength grow over time. Gamified Fitness Experience: Earn trophies for hitting milestones, keep your motivation high with streaks, and dive into in-depth exercise stats that help you optimize your routine. Flexer transforms every workout into a challenge, motivating you to push your limits and celebrate your achievements. Get addicted to working out as you rack up wins and track your progress like never before. Download Flexer today and turn your workouts into a game that you’ll want to keep playing.

About

Built Workout

This app helps you optimize your strength training by showing which muscles are recovered and ready for your next workout. It offers smart tracking, AI coaching based on your history, and tools to log, share, and visualize your progress.

Highlights
  • Muscle recovery heatmap
  • Gym-optimized logging keyboard
  • AI coaching based on training history
  • Workout sharing with muscle maps
  • Stabilized transformation video creation
  • Exercise library and custom routines
Features
Read full description

Stop guessing what to train next. Built shows you which muscles are recovered and which aren't, on a body map that updates after every workout. Log sets with a keyboard made for the gym, see your week by muscle, and get coaching built on your real training. Every new member can start with a 7-day free trial. WHAT BUILT DOES 1. Know exactly when each muscle is ready An interactive anatomy map shows recovery across your whole body. Tap any muscle for its recovery level, the time until it's ready, and exercises that fit. Front, side and back views update after every session. 2. Start today's session in one tap Built ranks your own routines by what's recovered, picks today's, and can build a session from scratch around the muscles that are ready. Rest day? A stretch session for what's sore. 3. Log faster with a gym keyboard A numeric keypad with +/- controls, last session's numbers filled in as placeholders, rest timers between sets, and personal records marked automatically. 4. See your week by muscle Sets per muscle every week, 12-week trends, the lifts behind them, and how balanced your training is. 5. A coach that knows your training Ask anything. The AI coach reads your workout history, recovery and balance before it answers, suggests exercises for what's recovered, and builds routines through conversation. 6. Share workouts your gym friends want to see Every post carries a map of the muscles you hit. Tag the song you trained to, make story cards, send routines by DM. Turn progress photos into aligned transformation videos in a few taps. 300+ exercises with visual guides, custom and community routines, workout reminders, and training partners to keep you consistent. Join 50,000+ lifters training with Built. Built Premium: the live recovery map with exact ready times, sessions built for today, progress by muscle, full AI coaching, stretch and recovery sessions, and unlimited timelapse photos. 7-day free trial on the yearly plan ($44.99/year), or $7.99/month. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in your Apple ID settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://www.builtworkout.com/terms-of-service.html Privacy Policy: https://www.builtworkout.com/privacy-policy.html

Screenshots

Flexer4 screens
Built Workout4 screens

Verdict

The call

The clearest difference is ratings volume: Built Workout at 357 against Flexer's 28. Flexer's advantage is review sentiment (95% vs 84%). On price, rating, update cadence and ads 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. Flexer sells 11 in-app purchases, starting at $4.99 per 7 days and Built Workout sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Flexer against 4.8 for Built Workout. That said, the two scores are not equally well evidenced: Built Workout has 357 ratings behind it against 28, so its average is the more settled of the two. Written reviews are what separate them: 95% of Flexer's written reviews are positive against 84% of Built Workout's.

UpkeepUpdate frequency

Flexer ships an update every 2 days, Built Workout every 3 days. The most recent releases landed on October 12, 2026 and October 17, 2026 respectively.

Scorecard2 real differences · 8 level
Flexer versus Built Workout: the parameters behind the verdict, then further details
ParameterFlexerBuilt Workout
PriceFreeFree
Rating4.7 (28 ratings)4.8 (357 ratings) — better
Positive reviews94.7% of reviews — better84.0% of reviews
Number of ratings28357 — better
Update frequencyEvery 2 days — betterEvery 3 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.517 — better
Further details — not scored
Size123 MB119 MB
Age rating4+12+
DeveloperTrembath Apps LLCNatanim Abebe

Customer experience

Flexer

All ratings28 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews19 reviews
Positive94.7%
Neutral0.0%
Negative5.3%

Built Workout

All ratings357 ratings
Positive96.4%
Neutral2.8%
Negative0.8%
Written reviews25 reviews
Positive84.0%
Neutral4.0%
Negative12.0%

In-app purchases

11 purchases

Flexer

Subscriptions11
  • Flexer$4.997 Days
  • Flexer7 Days trial$4.997 Days
  • Flexer Monthly$9.991 Month
Show 8 more
  • Flexer Pro Monthly7 Days trial$11.991 Month
  • Flexer$14.991 Month
  • Flexer monthly$19.991 Month
  • Flexer Yearly$59.991 Year
  • Flexer Pro Yearly7 Days trial$69.991 Year
  • Flexer$89.991 Year
  • Flexer7 Days trial$95.991 Year
  • Flexer Yearly$95.991 Year
2 purchases

Built Workout

Subscriptions2
  • Built Premium Monthly$7.991 Month
  • Built Premium Yearly7 Days trial$44.991 Year

Questions

Is Flexer free?
Flexer is free to download, with in-app purchases available.
Is Built Workout free?
Built Workout is free to download, with in-app purchases available.
Which has better reviews, Flexer or Built Workout?
Built Workout is rated higher. Flexer averages 4.7 out of 5 from 28 ratings, while Built Workout averages 4.8 from 357 ratings.
Do Flexer or Built Workout have ads?
Neither Flexer nor Built Workout shows ads.
Which is updated more often, Flexer or Built Workout?
Flexer ships an update every 2 days, and Built Workout every 3 days. Most recently, Flexer was updated on October 12, 2026 and Built Workout on October 17, 2026.

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