Comparison

Katalyst vs BODY20

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

Head to head
About

Katalyst

This app enhances a revolutionary workout system using Electro Muscle Stimulation (EMS) to engage all muscles simultaneously. It offers a full-body workout in just 20 minutes, with zero joint load. Access diverse workout programs and control intensity for personalized training.

Highlights
  • Electro Muscle Stimulation (EMS) training
  • Full-body engagement
  • 20-minute workouts
  • Zero joint load
  • Diverse workout library (strength, power, cardio, recovery)
  • Adjustable impulse intensity
  • Offline workout access
Features
Read full description

THE WORLD’S MOST EFFICIENT WORKOUT The Katalyst App is the companion to the Katalyst Training System, a revolutionary new workout that uses Electro Muscle Stimulation (EMS) to engage all of your muscles simultaneously. Our patented training system and wearable suit, controlled by the Katalyst App, delivers specially-tuned, low-frequency impulses to each of your major muscle groups. These impulses imitate the brain signals that cause your muscles to contract and, when combined with simple, bodyweight movements, multiply the results of any exercise. The result is a complete, full-body workout that engages up to 90% of your muscle fibers in just 20 minutes, even hard-to-reach back stabilizers. And because Katalyst does the heavy lifting for you, there is zero load added to your joints. HOW TO JOIN & ACCESS THE KATALYST APP New to Katalyst? Download the app and get a sneak peek of what your next fitness journey could look like. Get your training system at katalyst.fit. Already have a Katalyst System? The Katalyst App is free to download. Simply create your profile or log in, and enjoy unlimited access. WORKOUTS FOR ALL FITNESS LEVELS Designed to fit your life and help you reach your goals, our professional trainers have created workouts from beginner to superhuman, and for all fitness levels in between. Get access to our full library of strength, power, cardio, and recovery workouts: Strength: Get a complete, full-body strength workout for more results in less time. Power: Engage your fast-twitch muscle fibers with intense, explosive strength classes. Cardio: Discover guided cardio workouts, or incorporate “freestyle” mode into your own cardio routine. Recovery: Active and passive recovery modes let you finish workouts like the pros. Massaging impulses help increase blood flow and nutrient distribution. AUTO-FOLLOW OUR INSTRUCTORS TO REACH YOUR GOALS Your Katalyst trainer adjusts the impulse intensity remotely throughout each workout, optimizing the effect of every session. All you have to do is focus on yourself. PUSH YOURSELF WHILE STAYING IN CONTROL Whether you want to push yourself harder, pull back slightly, or target a particular muscle group, our app allows you to precisely control every aspect of the workout. You are always in charge of how hard you train. WORKOUT ANYTIME, ANYWHERE Preload and store your workouts so you can train anywhere, even offline and without internet access. MEDIA FEATURES Airplay: Bring the instructor to life on your AirPlay-enabled device and use your iPad as a remote control! Spotify: The right sound to help you get in the zone - listen to our curated playlists or play your own favorite music. Download the Katalyst App and get your personal Full-Body EMS training any time, any place. Learn more at www.katalyst.com

About

BODY20

Manage your fitness journey with this app. Book, cancel, or reschedule your training sessions. Stay informed about studio news and monitor your progress.

Highlights
  • Book, cancel, reschedule sessions
  • Track fitness results
  • Stay updated on studio news
  • Member information management
Read full description

BODY20 Booking/Member information act. Use this app to book/cancel/reschedule sessions with BODY20. Track your results & keep up to date with studio news!

Screenshots

Katalyst4 screens
BODY203 screens

Verdict

The call

The clearest difference is review sentiment: Katalyst at 81% against BODY20's 0%. Katalyst also leads on rating (4.6 vs 2.0) and update cadence (every 3 weeks vs every 5 months). BODY20's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (11.0 vs 16.0). 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

Katalyst holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: Katalyst has 58 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 81% of Katalyst's written reviews are positive against 0% of BODY20's.

UpkeepUpdate frequency

Katalyst ships an update every 3 weeks, BODY20 every 5 months. The most recent releases landed on August 17, 2026 and July 8, 2026 respectively.

Scorecard6 real differences · 4 level
Katalyst versus BODY20: the parameters behind the verdict, then further details
ParameterKatalystBODY20
PriceFreeFree
Rating4.6 (58 ratings) — better2.0 (8 ratings)
Positive reviews80.6% of reviews — better0.0% of reviews
Number of ratings58 — better8
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS16.011.0 — better
Further details — not scored
Size126 MB67 MB
Age rating4+4+
DeveloperKatalyst Interactive Inc.Body20 Global USA, LLC.

Customer experience

Katalyst

All ratings58 ratings
Positive87.9%
Neutral3.4%
Negative8.6%
Written reviews31 reviews
Positive80.6%
Neutral6.5%
Negative12.9%

BODY20

All ratings8 ratings
Positive12.5%
Neutral25.0%
Negative62.5%
Written reviews5 reviews
Positive0.0%
Neutral40.0%
Negative60.0%

In-app purchases

None

Katalyst

No in-app purchases

None

BODY20

No in-app purchases

Questions

Is Katalyst free?
Katalyst is free to download, with no in-app purchases.
Is BODY20 free?
BODY20 is free to download, with no in-app purchases.
Which has better reviews, Katalyst or BODY20?
Katalyst is rated higher. Katalyst averages 4.6 out of 5 from 58 ratings, while BODY20 averages 2.0 from 8 ratings.
Do Katalyst or BODY20 have ads?
Neither Katalyst nor BODY20 shows ads.
Which is updated more often, Katalyst or BODY20?
Katalyst ships an update every 3 weeks, and BODY20 every 5 months. Most recently, Katalyst was updated on August 17, 2026 and BODY20 on July 8, 2026.

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