Comparison

Mendi App vs Katalyst

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

Head to head
About

Mendi App

This app uses a connected headband with advanced neurofeedback technology to monitor brain activity. It provides scientifically-validated cognitive training designed to improve focus, memory, and emotional balance through personalized exercises.

Highlights
  • Advanced neurofeedback technology
  • Real-time brain activity insights
  • Scientifically-validated cognitive training
  • Boosts neuroplasticity
  • Comfortable and lightweight headband
  • Bluetooth connectivity
Features
Read full description

Unlock Your Brain’s Full Potential with Mendi Elevate your cognitive wellness and transform your daily mental routine with Mendi, the brain training solution that harnesses advanced neurofeedback technology to help you thrive. Experience Cutting-Edge Brain Training Mendi pairs a sophisticated app with a sleek, lightweight headband to deliver scientifically-validated cognitive training. Utilizing state-of-the-art Functional Near-Infrared Spectroscopy (fNIRS), our system monitors changes in oxygenated blood flow to your prefrontal cortex, the brain’s powerhouse for focus, memory, emotional balance, and decision-making. With every session, gain clear, real-time insights into your brain’s performance and push your mental fitness to new heights. How It Works — Advanced Neurofeedback: Sensors on the Mendi headband track your brain’s activity, delivering precise and actionable feedback through proprietary algorithms. — Brain Training: Think of each session as an exercise for your mind, designed to boos neuroplasticity and strengthen your cognitive capabilities. — Safe & Scientifically-Backed: Our training protocol is not only effective but also grounded in rigorous scientific research, ensuring a safe and lasting benefit for your brain health. Consistency is Key Achieve measurable improvements by integrating Mendi into your routine. For optimal results, commit to daily training for six to eight weeks and experience a noticeable boost in mental clarity and focus. Meet the Mendi Headband — Effortless Connectivity: Enjoy quick, reliable connections with Bluetooth Low Energy (BLE). — Innovative fNIRS Technology: Experience neurofeedback engineered to revolutionize brain training. — Designed for Comfort: Weighing just 55g, the headband is both lightweight and comfortable for extended sessions. — Smart Features: Equipped with a built-in accelerometer and gyroscope, USB Type-C charging, and up to 60 sessions per charge, Mendi is built to keep up with your busy lifestyle. Invest in a Healthier, Sharper Mind With Mendi, taking charge of your brain health has never been more accessible or engaging. Join countless others on the journey to enhanced focus, improved emotional regulation, and better decision-making. Start your brain training revolution today and unlock the potential of a sharper, more resilient mind. Elevate your brain fitness, download Mendi now and experience the future of cognitive enhancement.

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

Screenshots

Mendi App4 screens
Katalyst4 screens

Verdict

The call

The clearest difference is update cadence: Mendi App at every 10 days against Katalyst's every 3 weeks. Mendi App also leads on ratings volume (454 vs 58). Katalyst's advantage is monetization model (free with in-app purchases vs paid) and device support (3 vs 1). On price, rating, review sentiment 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. 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 4.4. That said, the two scores are not equally well evidenced: Mendi App has 454 ratings behind it against 58, so its average is the more settled of the two. Written reviews point the same way: 77% of Mendi App's written reviews are positive against 81% of Katalyst's.

UpkeepUpdate frequency

Mendi App ships an update every 10 days, Katalyst every 3 weeks. The most recent releases landed on September 17, 2026 and August 17, 2026 respectively.

Scorecard4 real differences · 6 level
Mendi App versus Katalyst: the parameters behind the verdict, then further details
ParameterMendi AppKatalyst
PriceFreeFree
Rating4.4 (454 ratings)4.6 (58 ratings) — better
Positive reviews76.7% of reviews80.6% of reviews — better
Number of ratings454 — better58
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS16.016.0
Further details — not scored
Size489 MB126 MB
Age rating17+4+
DeveloperMendi Innovations ABKatalyst Interactive Inc.

Customer experience

Mendi App

All ratings454 ratings
Positive85.0%
Neutral4.0%
Negative11.0%
Written reviews249 reviews
Positive76.7%
Neutral6.0%
Negative17.3%

Katalyst

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

Bugs and requests

Mendi App

Reported bugs

4 issues
  • App freezing and crashing
  • Headband sensor issues
  • Inconsistent score/progress tracking
  • Orientation and display problems

Requested features

5 requests
  • More game/training variety
  • Advanced data tracking and analytics
  • iPad/tablet support
  • Customization options for visuals and audio
  • Integration with other health/fitness apps

Katalyst

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Mendi App

No in-app purchases

None

Katalyst

No in-app purchases

Questions

Is Mendi App free?
Mendi App is free to download, with no in-app purchases.
Is Katalyst free?
Katalyst is free to download, with no in-app purchases.
Which has better reviews, Mendi App or Katalyst?
Katalyst is rated higher. Mendi App averages 4.4 out of 5 from 454 ratings, while Katalyst averages 4.6 from 58 ratings.
Do Mendi App or Katalyst have ads?
Neither Mendi App nor Katalyst shows ads.
Which is updated more often, Mendi App or Katalyst?
Mendi App ships an update every 10 days, and Katalyst every 3 weeks. Most recently, Mendi App was updated on September 17, 2026 and Katalyst on August 17, 2026.

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