Mendi App vs ECHO Water
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Advanced neurofeedback technology
- Real-time brain activity insights
- Scientifically-validated cognitive training
- Boosts neuroplasticity
- Comfortable and lightweight headband
- Bluetooth connectivity
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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.
ECHO Water
This app provides a streamlined and dependable interface for operating your Echo Flask. It offers a simplified user experience for managing hydrogen water generation.
- Simplified operation
- Reliable performance
- Echo Flask management
- Hydrogen water generation
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We rebuilt the ECHO Water app from the ground up to deliver a simpler, more reliable way to use your Echo Flask.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Mendi App | ECHO Water |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (454 ratings) — better | 2.7 (52 ratings) |
| Positive reviews | 76.7% of reviews — better | 20.3% of reviews |
| Number of ratings | 454 — better | 52 |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 489 MB | 49 MB |
| Age rating | 17+ | 4+ |
| Developer | Mendi Innovations AB | Echo Water |
Customer experience
Mendi App
ECHO Water
User reviews
Mendi App
From 454 App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Helpful for focus and mental health
- 🧠 Improves brain function
- 💤 Helps with sleep and relaxation
- 🤝 Positive impact on daily life
Room to improve
- 🐛 App crashes and glitches
- 🔌 Connectivity issues with headband
- 📊 Lack of data/progress tracking
- 🕹️ Limited game/training options
- 🤒 Caused negative side effects for some users
ECHO Water
From 52 App Store ratingsWhat we love
- 🚀 Sleek and compact design
- 💡 Customizable color options
Room to improve
- 🐛 Connectivity issues with app
- 🐛 Inaccurate water tracking
- 🐛 Firmware update problems
- 🔋 Unreliable battery life
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
ECHO Water
Reported bugs
3 issues- App unable to sync with water bottle
- Inconsistent flask counting
- Bluetooth pairing problems
Requested features
3 requests- Ability to manually log water intake
- Scheduling options for hydrogen water
- Improved app performance and stability
In-app purchases
Mendi App
No in-app purchases
ECHO Water
No in-app purchases









