# Mendi App vs ECHO Water

The clearest difference is review sentiment: Mendi App at 77% against ECHO Water's 20%. Mendi App also leads on rating (4.4 vs 2.7) and update cadence (every 10 days vs every 3 weeks). ECHO Water's advantage is monetization model (free vs paid) and device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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 2.7. That said, the two scores are not equally well evidenced: Mendi App has 454 ratings behind it against 52, 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 20% of ECHO Water's.

Mendi App ships an update every 10 days, ECHO Water every 3 weeks. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mendi App | ECHO Water |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (454 ratings)](https://appshunter.io/ios/app/mendi-app/id1548944912/reviews)** | [2.7 (52 ratings)](https://appshunter.io/ios/app/echo-water/id6739596759/reviews) |
| Number of ratings | **454** | 52 |
| Positive reviews | **76.7% of reviews** | 20.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Paid | **Free** |
| Size | 489 MB | 49 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Mendi Innovations AB](https://appshunter.io/developer/1463276456) | [Echo Water](https://appshunter.io/developer/1786253277) |

## 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


### ECHO Water

[App page](https://appshunter.io/ios/app/echo-water/id6739596759)

This app provides a streamlined and dependable interface for operating your Echo Flask. It offers a simplified user experience for managing hydrogen water generation.

**Highlights:** Simplified operation, Reliable performance, Echo Flask management, Hydrogen water generation

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Sleek and compact design
- 💡 Customizable color options

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🐛 Inaccurate water tracking
- 🐛 Firmware update problems
- 🔋 Unreliable battery life

**Reported bugs**

- App unable to sync with water bottle
- Inconsistent flask counting
- Bluetooth pairing problems

**Requested features**

- Ability to manually log water intake
- Scheduling options for hydrogen water
- Improved app performance and stability


## Frequently asked questions

### Is Mendi App free?

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

### Is ECHO Water free?

ECHO Water is free to download, with no in-app purchases.

### Which has better reviews, Mendi App or ECHO Water?

Mendi App is rated higher. Mendi App averages 4.4 out of 5 from 454 ratings, while ECHO Water averages 2.7 from 52 ratings.

### Do Mendi App or ECHO Water have ads?

Neither Mendi App nor ECHO Water shows ads.

### Which is updated more often, Mendi App or ECHO Water?

Mendi App ships an update every 10 days, and ECHO Water every 3 weeks. Most recently, Mendi App was updated on September 17, 2026 and ECHO Water on September 21, 2026.

---

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