# Opti Calm vs Mendi App

The clearest difference is rating: Mendi App at 4.4 against Opti Calm's 3.0. Mendi App also leads on monetization model (paid vs subscription) and ratings volume (461 vs 2). Opti Calm's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

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

Mendi App holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Mendi App has 461 ratings behind it against 2, so its average is the more settled of the two.

Opti Calm ships an update every 2 months, Mendi App every 10 days. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Opti Calm | Mendi App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/opti-calm/id1321696251/reviews) | **[4.4 (461 ratings)](https://appshunter.io/ios/app/mendi-app/id1548944912/reviews)** |
| Number of ratings | 2 | **461** |
| Positive reviews | — | 76.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Subscription | **Paid** |
| Size | 280 MB | 489 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Optiherence](https://appshunter.io/developer/948846804) | [Mendi Innovations AB](https://appshunter.io/developer/1463276456) |

## What reviewers say

### Opti Calm

[App page](https://appshunter.io/ios/app/opti-calm/id1321696251)

Train your brain to reach optimal performance patterns with this app. It uses a compatible external brain-sensing accessory to provide visual and audio feedback, guiding you to a state of calm for meditation or high-pressure activities. Improve efficiency and recall your best performance brain patterns.

**Highlights:** Brain activity sensing integration, Visual feedback (score, video, brain representation), Audio feedback (music volume), Calm brain training algorithm, Performance optimization, Meditation and sports training modes

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Opti Calm free?

Opti Calm is free to download, with no in-app purchases.

### Is Mendi App free?

Mendi App is free to download, with no in-app purchases.

### Which has better reviews, Opti Calm or Mendi App?

Mendi App is rated higher. Opti Calm averages 3.0 out of 5 from 2 ratings, while Mendi App averages 4.4 from 461 ratings.

### Do Opti Calm or Mendi App have ads?

Neither Opti Calm nor Mendi App shows ads.

### Which is updated more often, Opti Calm or Mendi App?

Opti Calm ships an update every 2 months, and Mendi App every 10 days. Most recently, Opti Calm was updated on November 2, 2026 and Mendi App on November 7, 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.*