# Katalyst > EMS workout companion app for full-body training with customizable intensity. (iPhone/iPad app by Katalyst Interactive Inc..) - Source: https://appshunter.io/ios/app/katalyst/id1558163458 (this page in markdown: same URL + `.md`) - Developer: [Katalyst Interactive Inc.](https://appshunter.io/developer/1558163460) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 4.60/5 from 58 App Store ratings · 31 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 126 MB - Languages: American English, German (Germany) - Released: 2021-03-24 - Data updated: 2026-08-17 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/katalyst/id1558163458/reviews.md ## What is Katalyst? 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 ## Key features - 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 ## Recent user reviews (10 of 31) All indexed reviews: https://appshunter.io/ios/app/katalyst/id1558163458/reviews.md ### 1/5 — App lagging *2026-06-27, version 2.0.16* App is lagging and not responsive , also pricing became predatory with this company ### 4/5 — Suit amazing, but… *2026-05-13* I love the suit. I love the technology. I love the results. After one year I am feeling great. And then reality struck… The subscription that was included with my original purchase had run out and now I am being charged $50 a month for crummy content, stale content, and otherwise little value add for the forced subscription. It’s a shame that something so special can be tainted by a crummy business model. Unfortunately, without the subscription, the suit is useless. Sad. Buyer, beware. ### 5/5 — Awesome *2026-02-17* Just got the V4 and the whole thing is great. I exercise and it takes a lot to get me sore, This thing got me sore. I was looking for something I could use at home. It takes time to get used to the electric tingling and the first time you suit up it will take you 20 minutes but after that basically 30 minutes total suit up and exercise. ### 1/5 — Great product ruined by subscriptions and price increase *2026-01-20, version 2.0.8* Was my favorite exercise product… ### 1/5 — DO NOT UPDATE *2026-01-19* Latest update broke offline mode. Great, I can download workouts to my device. Great, if I try to workout without internet, the new update immediately logs me out. Absolutely useless feature now. App features and workouts haven’t really changed in 14+ months. Presumably this new “update” was to prevent users from using the hardware without their $1,000 membership. Used to be a raving fan for years. These kinds of updates make me wish I purchased something else. Go with TitanBody, SQAI, or VisionBody instead ### 5/5 — A great way to exercise *2025-03-27* I love my suit and the app - it’s a great way to exercise, especially the fact that it is low impact. I hope the brand and concept continue to grow. I’ve seen noticeable results! ### 5/5 — Transformed my physicality *2024-10-01, version 1.23.4* Been using EMS for 5 months now and I can safely say it healed my back pain and fixed my core. ### 5/5 — Katalyst Rocks! *2024-07-29* I am thoroughly impressed with Katalyst, a fitness app that truly delivers on its promises. Unlike many other products in this category that often overpromise and underdeliver, Katalyst stands out by providing an exceptional user experience. One of the key highlights of this app is its 20-minute workouts, which are not only highly effective but also easily adjustable to suit your current energy levels. The setup process for the suit may require a session or two to get accustomed to, but once you've got the hang of it, it takes just a couple of minutes to get ready for your workout. I wholeheartedly recommend Katalyst to anyone looking for a (supplemental) top-notch fitness solution. However, there are a few areas where the app could be further enhanced: 1. Workout Progress Tracking: When engaged in a workout series, it would be beneficial to have a progress check mark or indicator to easily identify which workouts have already been completed. 2. Cross-Device Synchronization: Currently, the Apple Watch app only functions when the workout is initiated or displayed from the iPhone. As an iPad user, I would greatly appreciate the ability to sync workouts between devices. It would be fantastic if the iPhone app could mirror the iPad's workout session without playing the video, allowing iPad users to access Apple Watch controls seamlessly. 3. Emergency Off Function: During the final minutes of some workouts, the intensity can reach quite high levels, which is generally a positive aspect. However, implementing a simple "emergency off" function would be a valuable addition, particularly in cases where users experience severe cramping or other health concerns that require an immediate stop. 4. Calorie Burn Synchronization: Integrating an approximate calorie burn calculation that syncs with Apple Health would be a welcome feature. This would provide users with a more comprehensive overview of their fitness progress and help them track their overall calorie expenditure. Despite these potential improvements, Katalyst remains an outstanding fitness app that delivers highly effective workouts in a compact and adjustable format. Its user-friendly interface and efficient workout structure make it a top choice for anyone seeking to enhance their fitness routine. In conclusion, I highly recommend giving Katalyst a try. With its impressive features and potential for further enhancements, this app is poised to revolutionize the way we approach our daily workouts. ### 5/5 — My butt doesn’t jiggle anymore *2024-06-22, version 1.22.5* Katalyst is made it so much easier to work out in 20 minutes. I’m done. I am a business owner, mom, housewife and everything else and sometimes I get too busy or just too tired to work out. Now I have zero excuses and this thing actually works. Yes it does feel like I’m cheating because it’s only 20 minutes, but if you’re doing it right, you’re sweating like crazy and getting the most efficient workout. I feel more firm and because of that I eat less so I think I’ve lost weight since I started the Katalyst. I guess it goes back to the more muscles. You have the more calories you burn. And Katalyst has helped me with keeping my muscle tone. ### 5/5 — Workout Hack *2024-03-02* Addendum to review below. Since the latest app updates, my workout history is not saving. Katalyst is quite the exercise hack. In 20 minutes, you get a full body workout that you can feel for days. The trainers are very professional and keep things moving. App suggestion: please make it so we can save our favorite workouts ## Frequently asked questions about Katalyst ### What is the Katalyst App? The Katalyst App is a companion to the Katalyst Training System, which uses Electro Muscle Stimulation (EMS) to provide a full-body workout. It controls the EMS impulses delivered through a wearable suit, allowing users to engage up to 90% of their muscle fibers in just 20 minutes with zero load on joints. ### What kind of workouts are available? The app offers a full library of workouts designed by professional trainers for all fitness levels, including strength, power, cardio, and recovery. Users can choose from beginner to advanced programs, or utilize freestyle mode for cardio. ### Is the Katalyst App free to use? The Katalyst App is free to download and use for those who already own a Katalyst System. New users can download the app to preview workouts, but the training system itself needs to be purchased separately from katalyst.fit. ### Can I control the workout intensity? Yes, the app allows for precise control over every aspect of the workout. You can adjust the impulse intensity to push yourself harder, pull back slightly, or target specific muscle groups, ensuring you remain in control of your training. ### Can I use the app offline? Yes, you can preload and store your workouts within the Katalyst App. This allows you to train anytime, anywhere, even offline and without an internet connection, making it convenient for travel or areas with limited connectivity. ## Version history (last 5 releases) ### 2.0.17 — 2026-07-16 This update includes improvements and bug fixes. ### 2.0.16 — 2026-06-15 This update includes improvements and bug fixes. ### 2.0.15 — 2026-05-20 This update includes bug fixes. ### 2.0.14 — 2026-05-07 This update includes bug fixes. ### 2.0.13 — 2026-04-16 This update includes bug fixes. ## Apps similar to Katalyst | App | Rating | Price | Category | | --- | --- | --- | --- | | [Somnee](https://appshunter.io/ios/app/somnee/id6445828473) | 3.7 (71) | Free | Health & Fitness | | [BODY20](https://appshunter.io/ios/app/body20/id6448731600) | 2.0 (8) | Free | Health & Fitness | | [Fountain Life](https://appshunter.io/ios/app/fountain-life/id6473792565) | 4.8 (280) | Free | Health & Fitness | | [Mendi App](https://appshunter.io/ios/app/mendi-app/id1548944912) | 4.5 (439) | Free | Health & Fitness | | [Power Plate®](https://appshunter.io/ios/app/power-plate/id1476430010) | 3.5 (31) | Free | Health & Fitness | | [Hapbee Sleep & Health Wearable](https://appshunter.io/ios/app/hapbee-sleep-and-health-wearable/id1514828720) | 4.2 (34) | Free | Health & Fitness | ## Related topics [katalyst](https://appshunter.io/ios/topics/katalyst) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*