# Mendi App vs Katalyst

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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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.

Mendi App ships an update every 10 days, Katalyst every 3 weeks. The most recent releases landed on September 25, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | Mendi App | Katalyst |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (454 ratings)](https://appshunter.io/ios/app/mendi-app/id1548944912/reviews) | **[4.6 (58 ratings)](https://appshunter.io/ios/app/katalyst/id1558163458/reviews)** |
| Number of ratings | **454** | 58 |
| Positive reviews | 76.7% of reviews | **80.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 489 MB | 126 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Mendi Innovations AB](https://appshunter.io/developer/1463276456) | [Katalyst Interactive Inc.](https://appshunter.io/developer/1558163460) |

## What reviewers say

### Mendi App

[App page](https://appshunter.io/ios/app/mendi-app/id1548944912)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful for focus and mental health
- 🧠 Improves brain function
- 💤 Helps with sleep and relaxation
- 🤝 Positive impact on daily life

**What reviewers complain about**

- 🐛 App crashes and glitches
- 🔌 Connectivity issues with headband
- 📊 Lack of data/progress tracking
- 🕹️ Limited game/training options
- 🤒 Caused negative side effects for some users

**Reported bugs**

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

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/katalyst/id1558163458)

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:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked 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 25, 2026 and Katalyst on August 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*