Katalyst vs PEPPER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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The Katalyst App is the companion to the Katalyst Suit, a wearable training system powered by advanced fitness technology. Together, they deliver a full-body workout no app can deliver on its own. A Katalyst Suit is required to train. The Katalyst Suit is an FDA-cleared, patented system that uses Electro Muscle Stimulation (EMS) to engage your major muscle groups at once. Low-frequency impulses mimic the signals your brain sends to contract a muscle. Pair them with simple bodyweight movements and every rep works harder, engaging up to 90% of your muscle fibers, including the deep back stabilizers most workouts miss, with zero load on your joints. ALREADY HAVE A KATALYST SUIT The app is free. Log in or create your profile for unlimited access. NEW TO KATALYST Explore the app and preview the workouts. Get your system at katalyst.com. WORKOUT MODES FOR EVERY LEVEL Programs built by professional trainers, from your first session to elite. - Strength: complete full-body strength in less time - Power: explosive sessions that recruit fast-twitch fibers - Cardio: lower-frequency sessions designed to build endurance, with quick recovery for daily use - Recovery: active and passive modes with massaging impulses to finish like the pros - Freestyle mode: Choose a mode, set your intensity, and train your own way. TRAIN LED OR TRAIN SOLO In guided classes, your trainer adjusts intensity in real time so you can focus on the movement. Prefer your own pace? Run independent programs on your terms. ALWAYS IN CONTROL Dial intensity up or down, or target a specific muscle group, at any moment. How hard you train is always your call. TRAIN ANYWHERE Stream any workout on demand, or download sessions ahead of time for when you'll be offline. BUILT FOR YOUR SETUP - Apple Watch: adjust overall intensity, pause, and resume workouts right from your wrist - AirPlay: put your instructor on the big screen and use your iPhone or iPad as the remote Get more strength and more out of life with Katalyst Suit workouts. katalyst.com
PEPPER
Enhance your workouts with an EMS suit and app. Access a library of tailored exercises for strength, cardio, and recovery, or integrate it with your existing routines. Customize intensity for each muscle group for a personalized fitness experience.
- EMS-tailored workout library
- Strength, cardio, and recovery programs
- Integrate with own workouts
- Adjustable impulse intensity per muscle region
- Tutorial and expert onboarding
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Intensify your training with your Electronic Muscle Stimulation suit and app by Pepper. Choose from a constantly evolving library of EMS-tailored workouts for strength, and cardio, and relax, developed with leading EMS experts. Alternatively, intensify your own workout routines and use the app to control your suit. The best fitness experience for beginners and experts alike. Adjust the EMS impulse intensity for every major muscle region individually to fit your needs and fitness level. You will complete a tutorial workout in the app showing you all the components necessary to get the best out of your EMS experience. If you need further assistance, schedule a live onboarding session with one of our experts (via info@peppermove.com) who will explain to you how Pepper works in detail. How to get started with Pepper? · Download the app · Order your Pepper suit at peppermove.com · And start training! Indications for use: The Pepper EMS Training System is an Over-The-Counter device intended to stimulate healthy muscles to improve or facilitate muscle performance. It is to be used by healthy adults only. The Pepper EMS Training System is not intended to be used in conjunction with therapy or treatment of medical diseases or medical conditions of any kind. None of the training programs or operational parameters are designed to target injured or ailing muscles and its use on such muscles is contraindicated. The Pepper EMS Training System’s electrical impulses allow the triggering of action potentials on the motoneurons of motor nerves (excitations). These excitations of motoneurons are transmitted to the muscle fibers via the motor endplate where they generate mechanical muscle fiber responses that correspond to muscle work. Depending on the parameters of the electrical impulses (pulse frequency, duration of contraction, duration of rest, total session duration), different types of muscle work can be imposed on the stimulated muscles. Environment of use: Athletic and Sports Training Environments
Screenshots
Verdict
The clearest difference is in-app purchases: Katalyst at none against PEPPER's 2. Katalyst also leads on rating (4.6 vs 4.3). On price, review sentiment, ratings volume and update cadence 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
Both are free to download. PEPPER sells 2 in-app purchases, starting at $24.90 per month. Katalyst asks for nothing beyond the download.
Katalyst holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 59 and 22 respectively. Written reviews complicate that: 81% of Katalyst's written reviews are positive against 83% of PEPPER's, so the app with the better star average is not the one people write more warmly about.
Katalyst ships an update every 3 weeks, PEPPER fortnightly. Both last shipped on October 25, 2026.
| Parameter | Katalyst | PEPPER |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (59 ratings) — better | 4.3 (22 ratings) |
| Positive reviews | 80.6% of reviews | 83.3% of reviews — better |
| Number of ratings | 59 — better | 22 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 155 MB | 128 MB |
| Age rating | 4+ | 17+ |
| Developer | Katalyst Interactive Inc. | Pepper Interactive GmbH |
Customer experience
Katalyst
PEPPER
In-app purchases
Katalyst
No in-app purchases
PEPPER
- PEPPER+ EMS video subscription$24.901 Month
- PEPPER+ EMS video subscription3 Months trial$199.001 Year








