Comparison

Opti Calm vs Mendi App

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

Head to head
About

Opti Calm

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
Read full description

**This application requires a subscription with Opti Brain to use. **This application also requires an external accessory that senses your brain activity to use. Compatible brain sensing hardware includes: -Muse Headband, -Smith Lowdown Focus Glasses powered by Muse The brain sensing hardware will connect your brain activity to this app and help you BETTER YOUR BEST™ by training your brain to reach its optimum performance pattern! Visit MyOptiBrain.com and purchase a subscription to learn to reach your optimum potential today! The Opti Calm app is produced by Opti Brain, a company dedicated to performance optimization. Opti Calm features our Calm brain training algorithm. Calm (previously know as Serenity in Opti Train) teaches the brain to decrease in activity. This algorithm is popular for daily meditation because less brain activity is reflected by a clear mind. In addition, this algorithm is popular to train with in high-pressure, performance sports because it can help you create more efficiency in your brain. For example, in a repetitive task such as putting a ball or throwing a pitch your goal while practicing can be to decrease your brain activity which increases the efficiency of your brain. Your goal would be to perform the same motion (with a high success rate) with less thought. Opti Calm offers visual feedback to guide your brain to an optimized brain pattern in the form of a percentage score, a playing/pausing video, or a color-changing brain representation. When the video is playing, when your index is higher, when the brain is completely colored you have found your Calm. Visual feedback is ideal to use while sitting still when you are thinking meditatively about an upcoming performance. Opti Calm also offers audio feedback in the form of music increasing or decreasing in volume to guide your brain. When the music is the most quiet you have found your Calm. It is ideally used while in motion to BETTER YOUR BEST™. For example, let your favorite music (chosen from your personal iTunes library) guide your brain while putting a golf ball, shooting at a target, or throwing a pitch. The more you train with Opti Calm, the easier it will be to identify your best performance brain pattern. Then take your Opti Calm best pattern to your performance. If you don't remember, your brain will! Opti Calm's sister app Opti Brain allows you to view the brain maps from your trainings. When you save a training it becomes available to be mapped in Opti Brain. To see how much Calm was present in your training, select the brain icon featuring the same aqua color theme as Opti Calm on the setup screen in Opti Brain.

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.

Screenshots

Opti Calm4 screens
Mendi App4 screens

Verdict

The call

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.

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

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Opti Calm versus Mendi App: the parameters behind the verdict, then further details
ParameterOpti CalmMendi App
PriceFreeFree
Rating3.0 (2 ratings)4.4 (461 ratings) — better
Positive reviews—76.4% of reviews
Number of ratings2461 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.0 — better16.0
Further details — not scored
Size280 MB489 MB
Age rating4+17+
DeveloperOptiherenceMendi Innovations AB

Customer experience

Opti Calm

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

Mendi App

All ratings454 ratings
Positive85.0%
Neutral4.0%
Negative11.0%
Written reviews254 reviews
Positive76.4%
Neutral6.3%
Negative17.3%

Bugs and requests

Opti Calm

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Opti Calm

No in-app purchases

None

Mendi App

No in-app purchases

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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