Fourth Frontier is a pioneering health tech company that builds and offers products and services for monitoring and improving heart health for people across the world. ------------------------------------------------- Frontier X2, our revolutionary patented product that provides real-time feedback on heart health to users on the move. Take control of your hearth health with the world's first smart heart monitor.If you need more information on our device and would like to speak to one of us regarding that, please book a demo call.Book a demoCalculate your heart score and get personalized insightsTake our quiz
Fourth Frontier (fourthfrontier.com) has 371 customer reviews on Five Star Index, with an average rating of 4.4 out of 5.
Also known as
fourthfrontier.com
Website
fourthfrontier.com
Category
Chemicals & Plastic
Listed on Five Star Index
2026
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The company replied to 97% of reviews.
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Most recent review: October 2026.
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I have had problems with my monitor, but the support team has been very responsive and has agreed to take back my existing monitor and replace it with a refurbished one.
Response from Fourth FrontierFeb 10, 2025
We're sorry to hear about your experience. We’re in touch with you through our support channel and are committed to finding a resolution. Please continue the conversation with our team so we can assist you further.
AP
Anthony P.
Great customer service
My initial experience, a couple of years ago with customer support wasn't that great, but boy have they turned things around! They responded to my email really quickly and with really good technical advice. It was first class service. Thank you Poonam!!
Response from Fourth FrontierFeb 3, 2025
Thank you for your feedback! We're glad to hear that you've noticed the improvements in our customer support and had a great experience this time. Providing quick and helpful assistance is our priority, and we appreciate you sharing your positive experience. If you ever need further support, feel free to reach out. Take care!
NE
Noel E.
Frontier X2
I initially thought that the Frontier X2 wouldn't be able to measure and display what I wanted. I was very wrong! I have only had the device a couple of days and it has met my expectations- and I don't think I've got to the bottom of it yet.
I got the device to be aware of health issues (AF) rather than sports related. The quality of the ECG printouts is outstanding. I managed to carry out a 17hr reading (including 8 hours of sleep).
The speed of delivery to the UK was as stated i.e. really quick and I had a helpful discussion with one of the helpers after ordering.
I look forward to finding out more about the Frontier X2 in the coming days.
Response from Fourth FrontierJan 13, 2025
Thank you for sharing your feedback! We’re thrilled to hear that the Frontier X2 has exceeded your expectations and is helping you track your health. It’s great to know the ECG quality and the extended 17-hour reading, including sleep, have met your needs. We're also glad the delivery and support were up to your standards. We hope you continue to discover more about the device, and we’re here if you need any assistance along the way!
JW
Jonathan W.
My early impressions are really good
My early impressions are really good. This looks like any similar heart rate montior, with a chest band containing electrodes. It's comfortable and easy to wear (you rapidly forget you have it on).
The difference is it records a continuous ECG rather than just measuring pulse rate. And it does it remarkably well. I'm a doctor, and I know how difficult it is to get a good quality ECG with a sweaty moving patient. Nonetheless, this system achieves it remarkably well. There is some noise/artefact on extremes of exercise, but so far my experience is nothing but positive.
Response from Fourth FrontierJan 13, 2025
Thank you for your fantastic feedback! We're thrilled to hear that the device is providing such reliable ECG data, even during intense exercise. We're glad to know the comfort and ease of use meet your expectations, and we’ll continue to work on improving the experience further. If you have any more thoughts or suggestions, feel free to share. We appreciate your support!
AN
Antonio
All's well that ends well!
20250107 UPDATE
after sending my considerations to the company, thanks to the interest of Sneha, who forwarded my query to the team, they agreed to replace the non-working device with a new one.
I just received the new frontier X2 today and I will try it as soon as possible, thank you so much.
All's well that ends well!
20241213
It wasn't a good experience!!
Please note that company policy, for their products, is to offer only 1 year warranty!!
I purchased the Fourth Frontier X2 at the price of Total: €400.76, on April 23, 2023, so 19 months ago.
I've always used it correctly, never in the water for swimming or other water sports (even if it is waterproof).
After 2 months from the purchase I started having problems, the device crashed very often and I have to reboot the device continuously, but at the end of November 2024 the device turned off and no longer worked.
I got in touch with the customer service and according to them the problem is the hardware; they proposed me a "special offer" dedicated exclusively to me.
They offered me a 30% discount, but considering that on their site they offer everyone a 25% discount, this means that the "special discount" for me is an extra 5%. Unbelievable!!!
No thanks, I will buy another device that offers more guarantees and above all from more serious companies and with different policies than yours.
Response from Fourth FrontierDec 19, 2024
We’re truly sorry to hear about your experience, and we understand your frustration. We always strive to provide the best support and we regret that we didn’t meet your expectations. We will further look into this and do our best to assist you with a satisfactory resolution.
Thank you for sharing your feedback, and we hope to have the opportunity to make things right.
JM
Jeremy M.
Not a good experience…
Updated review - I was having heart issues so was very interested in the frontier x2 to monitor my heart over extended periods and during exercise.
However, my personal experience is that the x2 isn’t fit for purpose. At best it works intermittently, often not at all, and when it does record an ecg, it is basically unintelligible for practical purposes. Its performance is even worse when exercising.
I have liaised with the helpdesk a couple of times and reset the device but I’ve come to the conclusion that it can’t do what it says it can do. It is no more than a poorly performing run of the mill hrm at 10x the price.
Back to my garmin hrm when I exercise and the Kardia when at home
Frontier customer services eventually replaced my device. It’s reading as I would expect now but only 3* due to my experience
Response from Fourth FrontierDec 13, 2024
We’re sorry to hear about your experience. Our team is committed to resolving this for you, and we’ll assist you further through our support channel.
PC
Philip C.
Premium subscription broke it all.
They sorted it out so I have adjusted the review.
Response from Fourth FrontierNov 19, 2024
Thank you for your feedback, and we’re truly sorry for the inconvenience you’ve experienced. We understand how frustrating this situation is, especially after having such a positive experience with us in the past. Please know that we are actively looking into the issue you’ve raised and are committed to resolving it as quickly as possible. We deeply apologize for any delays, and we appreciate your patience as we work to fix the problem. Your satisfaction is our priority, and we’ll continue to support you through this process.
AN
Anthony
For those of us who are aging-athletes…
For those of us who are aging-athletes with many decades of ultra-endurance training and competition and consequent cardiovascular issues, the metrics FF X2 provides are indispensable to be able to see in real-time. For me, those data, when combined with real-time measurement of muscle oxygen and watt output allow me to calibrate my work to enhance safety and fitness. To my knowledge, there are no other wearable monitors at the price point of the X2 and Premium subscription that can provide such data.
Response from Fourth FrontierNov 4, 2024
Thank you for sharing your experience! We’re glad the Frontier X2 provides the real-time insights you need to balance safety and performance in your training. Hearing that it stands out in value and functionality for dedicated athletes like you is incredibly rewarding. Keep pushing forward, and we’re here to support you every step of the way!