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Mendi review for 2024

In the last few years, brain training and neurofeedback devices have exploded in popularity. Each year more and more people turn to this innovative tech in an effort to improve their focus and reduce their stress.

A popular choice is Mendi, a neurofeedback device which claims to monitor and improve your brain function. But is Mendi truly the best option or are its benefits exaggerated?

In this review, I take a deeper look at Mendi. I analyze customer experiences, the scientific backing behind its claims, and its potential benefits to determine whether it’s worth the price.

How I evaluated the Mendi Neurofeedback device

To evaluate Mendi, I focused on key factors including:

BenefitsDoes it improve sleep, focus, and mood?
TechnologyHow does it work?
User experienceAre customers satisfied?
PriceIs it worth the cost?
  • Benefits. I looked at all the benefits Mendi claims on its site and tried to find scientific studies as well as research papers to determine whether these claims are true.
  • Technology. I figured out how Mendi works using the brand’s product pages, videos, and articles.
  • User experience. I analyzed Mendi’s reviews on various sites and read through the company's testimonials to see whether or not customers are satisfied.
  • Price. I used the brand’s site to get the full price of the product and compared it to competitor products of a similar quality to see if it's good value.

Pros and cons of Mendi

How does the Mendi headset work?

Mendi works by monitoring your brain activity and giving feedback.

You put the Mendi headband on with the front positioned around the centre of your forehead. This allows the product to monitor key indicators of brain activity in the prefrontal cortex (believed to be the part of your brain which manages decision-making and emotional responses to stress.)

Unlike many neurofeedback devices, Mendi doesn’t monitor the electrical impulses in your brain with electrodes (EEG) or analyze your brainwaves. Instead, it shines near-infrared light through your skull. Then, with light sensors, it can detect changes in the blood flow and oxygen levels in the prefrontal cortex. This non-invasive brain imaging technique is called functional near-infrared spectroscopy (fNIRS.)

Mendi headset

These key factors are used to determine changes in your brain’s activity levels. Then, your brain activity is visualized with Mendi’s brain-training app which is available on Android and iOS. Mendi describes this app as a game that you control with your brain.

When the app thinks you’re focusing properly (with higher oxygen levels and blood flow in the prefrontal cortex,) you can make the in-game ball go up – essentially you level up. This positive visual feedback encourages you to actively engage in the game and focus more. Over time, consistent brain training may lead to improved cognitive functioning.

What are the benefits of using Mendi?

According to Mendi’s website, there are three main benefits to using the neurofeedback headband. There are a few studies I found which back up the brand's claims.

Better emotion regulation

Probing fMRI brain connectivity and activity changes during emotion regulation by EEG neurofeedback, a study which involved 35 healthy subjects, demonstrated fMRI’s ability to improve mood control. However, without larger clinical trials, it’s impossible to say for certain this was caused by the neurofeedback technology alone and not something else (such as the placebo effect.)

Increased focus

A study on improving attention through individualized fNIRS neurofeedback training, which involved 10 healthy college students, found success in improving their participants' attention with the use of fNIRS technology. Granted, this is a small sample size. However, it shows some promise in Mendi’s claims of increasing focus.

Better sleep

I couldn’t find any studies specifically concluding that neurofeedback devices such as Mendi can improve your sleep. However, if Mendi’s claims are true and you can reduce your stress levels this would naturally translate to a better night's rest!

Alleviated depression and anxiety

A research paper on optical brain imaging and its application to neurofeedback cites four studies which show promise for using real-time brain imaging to help people suffering from depression and other psychological disorders.

These scientific studies show some promise for the device and you might find it beneficial. However, it’s important to note that outcomes vary from person to person. It’s always best and safest to consult a healthcare professional first.

How to use the Mendi neurofeedback system

To get started on your brain training with Mendi’s neurofeedback system you need to:

  1. Get the app. Download Mendi’s App by scanning the QR code on the welcome card. Alternatively, you can search for Mendi Brain Training on Google Play or the App Store (depending on your smartphone.) Then, in the app, create a Mendi account and log in.
  2. Prepare for first use. Take a look at the manual provided and make a note of any necessary safety precautions you need to take. There are also some tips on maximizing efficiency such as avoiding bright lights when doing the training exercises. If it’s not yet charged, connect the USB-C connector (provided in the box) to Mendi’s charging port (on the side) and plug it into an appropriate power source. It might take a little longer than advertised to charge the first time you do this.
  3. Put the headband on. Once charged, position the headband around your head. The side with the power button should be nearest the front of your head and be positioned on your left. If necessary, adjust the straps on the back so the device fits snuggly and comfortably around your head without the risk of it falling off when you move around.
  4. Power on. Press the Power button on the headband. Launch the app and link your smartphone to the Mendi headset following the in-app instructions. Press Get Started and then Start Sensor.
  5. Start brain training. Once your Mendi device has calibrated, choose how many minutes of training you want to do and press Get Started. Relax and focus on the ball until the training session is complete. After your session, your score is displayed. This score is saved in the app so you can monitor your progress.

Mendi neurofeedback device cost

The Mendi neurofeedback device costs $299 and, when I checked, doesn’t add any extra taxes (in the US) at the checkout. This price includes the Mendi headset, a charging cable, and the Mendi brain health app. A smartphone app which, according to the site, you will never have to pay for.

I was particularly impressed with Mendi’s free international shipping. According to the device’s product page, it is valid in every country it ships to including the United States, Australia, Canada, Germany, and Sweden!

You also get a 30-day money-back guarantee. But you must return the device in its original packaging and a resellable condition. Once returned, if accepted, you receive your money back minus the return shipping cost.

Does Mendi have any side effects?

Overall, Mendi is considered safe. According to Mendi, its use of fNIRS technology makes the headband extremely safe because it doesn’t work with ionizing radiation.

I also found a few independent studies that are included in the Narrative Review on Clinical Applications of fNIRS which refers to the same technology Mendi uses as safe.

However, every situation and person is different. It’s always best to consult a licenced health professional before you purchase and use Mendi. Especially if you suffer from PTSD, depression, or any other psychological condition.

After all, Mendi is not FDA-cleared so it’s not a medical device. It’s not cleared or approved for treating health conditions and Mendi hasn’t conducted any large-scale clinical trials. So, while there’s evidence to suggest it’s generally safe, its medical effectiveness isn’t completely clear.

Mendi vs. other neurofeedback devices

Mendi isn’t the only neurofeedback device! Here’s how Mendi sizes up against its competitors.

Kit price$299$1,500$444.98
What's includedFree brain-training mobile game for lifeHeadsetfNIRS Brain sensorsBehavioural Science and lifestyle recommendations60-day free membership trialHeadsetEEG / brainwave sensors GeniusPulse™ Controller1-year membership includedMuse S HeadsetEEG / brainwave sensors 500+ guided meditations
Membership price$0$300 (paid yearly)$49.99 (paid yearly)
How it worksfNIRS technology (mainly blood flow and oxygenation in the PFC)EEG monitoring (brain waves,)photobiomodulation (light simulation,)heart rating monitoring,brain function assessment, meditation trainingEEG monitoring (brain waves) and heart rate detection
Battery lifeUp to 5 hours of playtimeMultiple sessions (no specifics)Up to 10 hours of playtime
Warranty30-day money-back guarantee for devices (still in resellable condition)30-day money-back guarantee (for undamaged returns)1-year hardware warranty100-day return period12-month warranty for defects or flaws (not caused by the customer)

What do Mendi customers say?

You can find most of Mendi’s reviews on TrustPilot where the brand has a 4-star average.

67% of these Trustpilot reviews are 5 stars. These happy customers mainly say Mendi has helped with focus, mood management, and relaxation. Others are very pleased with the customer service.

11% of customers left either a 4 or 3-star review. Overall, these buyers are satisfied with the product – feeling that it has had some benefit. But a few complain of bugs and hardware defects.

21% of reviews are 2 and 1 stars. Most of these unsatisfied customers didn’t feel as though they benefited from using the device. Others don’t like brain-training app quality saying it has bugs or that they find it difficult to navigate. However, the app has been updated recently and there haven’t been any bad reviews about it in the last few months.

Headset Mendi

On Reddit, there are mixed opinions. Some people with PTSD claim the device helped them manage their emotions. However, it’s important to remember these are people's personal experiences.


If you have a mental health disorder, you should consult a healthcare professional before using Mendi’s neurofeedback device. Some Redditors have expressed doubts about the efficiency of Mendi’s brain-monitoring method!

Conclusion: is Mendi worth it?

Whether Mendi is worth it or not depends on you – mainly what you expect from the device and your budget.

Based on customers' reviews, online forums, and the scientific research surrounding the technology Mendi uses – it seems as though there might be some truth to its claims. It’s possible the device can help you with sleep, managing emotions, stress reduction, and focus.

However, without FDA clearance and large-scale clinical trials, it’s impossible to say for certain the device is going to work the way you want it to. It’s best to consult a medical professional for personalized advice.

That being said, compared to other neurofeedback headsets, Mendi is very affordable and has no membership fees. The fNIRS technology it uses is generally safe. Plus, Mendi offers a 30-day money-back guarantee.

If you’re not convinced about Mendi’s benefits, you can always try it and if you don’t like it you can claim your money back. So, it’s definitely worth trying out!


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