Comparison

F45 Training vs StretchLab

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

Head to head
About

F45 Training

This app helps you manage your fitness journey with class booking, challenge participation, and personalized meal plans. Track your progress with heart rate monitoring and fitness assessments, and even order ready-made meals for convenience.

Highlights
  • Book classes and join waitlists
  • Participate in 45-Day Challenges
  • Track heart rate and session results
  • Discover and order dietitian-curated meal plans
  • Log and share fitness assessment results
  • Watch workouts from your phone
Features
Read full description

Unlock your potential with the new F45 Training app (previously named F45 Challenge). • Book classes and scans, join waitlists and check class schedules. • Join and complete 45-Day Challenges. • Register your LionHeart device and see your session results. • Discover meal plans curated by our world-class dietitians and order meals. • Easily log and share your results for fitness assessments like Playoffs or Benchmark and join Red vs. Blue Teams to stay motivated. • Watch or cast workouts right from your phone for when you can’t make it to the studio. CLASS BOOKING - Book classes, join waitlists and check class schedules. With our exclusive F45 booking experience see all of our workout brands you know and love as well as exactly whether its a cardio, strength, recovery or hybrid day. You can also book an in-studio body scan, helping you to understand your body composition and personal fitness journey. LIONHEART INSIGHTS - Realize your results faster with LionHeart. LionHeart is F45’s in-studio gamification platform where a points system, with a compatible LionHeart heart rate monitor, encourages you to stay above 70% of your max heart rate to hit the goal of 45 points! Shortly after class finishes you can view and share performance reports showcasing min and max heart rate, calories burned and LionHeart points. Don’t have a LionHeart heart rate monitor? Talk to your studio or reach out in the app. JOIN 45-DAY CHALLENGES - A guided 45-day program focused on your personal fitness and performance progress through F45’s team training, goal-targeted nutrition, and fresh wellness education to support a holistic training lifestyle. The F45 Training app extends your experience beyond the studio to register for upcoming Challenges, set personal goals, complete check-ins and Inbody Scans, and share your results. TAILORED MEAL PLANS - Discover meal plans and recipes curated by our world-class dietitians. Further your understanding about nutrition and wellbeing from industry experts through constantly updated articles. Achieve your health goals, whether it is to reduce body fat, build muscle, or simply feel better about your wellness with calorie guide suggestions. ORDER READY-MADE MEALS - Save time in the kitchen with ready-made meals designed to give you the high-quality nutrition you need to power through your F45 sessions. All meal vendors are approved by the Challenge nutrition team to help you stay on track, allowing you to focus on achieving your goals. Select the appropriate region in-app to see the available providers and order today. COMPLETE ASSESSMENTS - Easily log and share your results for fitness assessments like Playoffs or Benchmark to know how you’re performing and improving over time. Each assessment has a companion workout or exercise run periodically in-studio with brand new assessments being added all the time so you can challenge yourself and stay motivated. Special graded assessments also rank your score and privately show if you’re in the Top 30% of finishers - an incredible achievement! WORKOUT WHEREVER - Watch or cast workouts right from your phone for when you can’t make it to the studio or when you want to add an extra recovery session at home. Access Bodyweight, Weighted and Recovery workouts to suit all fitness levels and equipment availability. Requires an active F45 membership to access. LEADERBOARD DISPLAY PROFILE - Bring your own personality to in-studio leaderboards with a profile picture and display name. Join exciting attendance, assessment and LionHeart competitions and games showcasing global and studio top performers. Not ready to celebrate your potential in the studio yet? That’s ok, you can also anonymize your profile until you’re ready to go!

About

StretchLab

Discover personalized stretching sessions, from 1-on-1 to group classes, designed to improve flexibility and reduce tension. Book sessions, track your progress, and find studios near you. Enhance your overall health and wellness with expert guidance.

Highlights
  • Browse schedule of 1-on-1 and group stretches
  • Filter stretches by date and Flexologist
  • Book sessions and add to calendar
  • In-app activity tracker
  • Find nearby studios on interactive map
  • Track monthly membership
  • Check in to sessions
Features
Read full description

Download our StretchLab app today no matter your flexibility level! Our app will help you find the stretching experience perfectly fit for you. Features: - Browse our schedule of upcoming 1-on-1 and group stretches - Have a favorite Flexologist? Filter stretches by date and Flexologist - Book stretches in the app and easily add them to your calendar with a simple click! - Check out our in-app activity tracker to keep track of your sessions over time - In a new area? Find a StretchLab studio near you using our interactive map - Keep track of your monthly membership - Check in to your next stretch in the app Stretching is ancient, but StretchLab has redefined what it means to stretch. Whether you’re an athlete looking to loosen up after a workout or a desk jockey just looking to increase mobility and reduce tension, we have flexibility experts at our studios with years of experience in yoga, athletics, fitness, health, chiropractic and more to create a personalized stretching experience just for you. What We offer: - Book an innovative group stretch to reclaim your freedom no matter your fitness level. Our group stretch is fully customized to fit your flexibility. - Need a more personalized experience? Book a 25 minute 1-on-1 with a Flexologist to find the right stretch for you. Our 25 minute customized stretching concentrates on major muscle groups like core, back, shoulders and hips. - If you need a deeper stretch, book the 50 minute stretch to work the extremities like the lower legs, feet, ankles, neck, arms, wrists and hands. Book your 1-on-1 to not just improve fitness, but your overall health and wellness Why you will love our stretch: - Reduce muscle pain and tension - Increase flexibility and mobility - Increase your sports performance - Transform your health and wellness - Track your stretches on the Apple Watch app - Track your progress on Apple Health app Join ClassPoints, our loyalty program! Sign up for free and accumulate points with every class you attend. Achieve different status levels and unlock exciting rewards, including retail discounts, access to priority booking, guest passes for your friends, and more! Download the StretchLab app today to find the flow and flexibility your body needs!

Screenshots

F45 Training4 screens
StretchLab4 screens

Verdict

The call

The clearest difference is monetization model: F45 Training at free against StretchLab's free with in-app purchases. F45 Training also leads on update cadence (every 10 days vs every 3 weeks). StretchLab's advantage is ratings volume (11K vs 202) and rating (4.8 vs 4.5). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

StretchLab holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: StretchLab has 11K ratings behind it against 202, so its average is the more settled of the two. Written reviews point the same way: 28% of F45 Training's written reviews are positive against 49% of StretchLab's.

UpkeepUpdate frequency

F45 Training ships an update every 10 days, StretchLab every 3 weeks. Both last shipped on September 24, 2026.

Scorecard5 real differences · 5 level
F45 Training versus StretchLab: the parameters behind the verdict, then further details
ParameterF45 TrainingStretchLab
PriceFreeFree
Rating4.5 (202 ratings)4.8 (11K ratings) — better
Positive reviews28.4% of reviews48.8% of reviews — better
Number of ratings20211K — better
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.1 — better16.0
Further details — not scored
Size112 MB152 MB
Age rating12+4+
DeveloperF45 TrainingXponential Fitness LLC

Customer experience

F45 Training

All ratings202 ratings
Positive83.2%
Neutral5.9%
Negative10.9%
Written reviews335 reviews
Positive28.4%
Neutral15.8%
Negative55.8%

StretchLab

All ratings10,740 ratings
Positive94.3%
Neutral1.3%
Negative4.4%
Written reviews127 reviews
Positive48.8%
Neutral4.7%
Negative46.5%

User reviews

F45 Training

From 202 App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Great workout and nutrition content
  • 🚀 Convenient class booking
  • 👍 Helpful for tracking progress
  • 🚀 Seamless fitness experience

Room to improve

  • 🐛 Frequent crashes and glitches
  • 🐛 Buggy app updates
  • 🐛 Unreliable sync and login issues
  • 🐛 Recipes have missing/incorrect ingredients
  • 🐛 Constant resets and loss of data

StretchLab

From 11K App Store ratings

What we love

  • 👍 Excellent stretching experience
  • 🙌 Knowledgeable and friendly staff
  • 💪 Improved flexibility and mobility
  • 🤩 Positive overall experience

Room to improve

  • 🐛 Buggy and unreliable app
  • 💰 Expensive services
  • 📞 Poor customer support and follow-up
  • ⏰ Difficulty booking appointments

Bugs and requests

F45 Training

Reported bugs

5 issues
  • App crashes when accessing recipes
  • Unable to log workouts and track progress
  • Shopping list and meal plan inconsistencies
  • Incorrect portion sizes and nutritional info
  • Inability to switch between male/female profiles

Requested features

5 requests
  • Add ability to save/favorite recipes
  • Improve recipe search and filtering
  • Integrate with Apple Health/Strava
  • Allow customization of meal plans and shopping lists
  • Provide more language and dietary options

StretchLab

Reported bugs

4 issues
  • App crashes and errors when booking appointments
  • Incorrect credit/session information displayed
  • Password reset issues and invalid links
  • Inability to log in or create an account

Requested features

4 requests
  • Ability to book appointments beyond current month
  • Option to view password during login
  • Improved app stability and functionality
  • Integration with calendar apps

In-app purchases

None

F45 Training

No in-app purchases

None

StretchLab

No in-app purchases

Questions

Is F45 Training free?
F45 Training is free to download, with no in-app purchases.
Is StretchLab free?
StretchLab is free to download, with no in-app purchases.
Which has better reviews, F45 Training or StretchLab?
StretchLab is rated higher. F45 Training averages 4.5 out of 5 from 202 ratings, while StretchLab averages 4.8 from 11K ratings.
Do F45 Training or StretchLab have ads?
Neither F45 Training nor StretchLab shows ads.
Which is updated more often, F45 Training or StretchLab?
F45 Training ships an update every 10 days, and StretchLab every 3 weeks. Most recently, F45 Training was updated on September 24, 2026 and StretchLab on September 24, 2026.

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