Dr Mitshu D.
Good
Good product
Response from Fourth FrontierSep 7, 2026
Thank you for your feedback! We’re glad you’re enjoying the product and appreciate your support 😊

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.
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Dr Mitshu D.
Good product
Response from Fourth FrontierSep 7, 2026
Thank you for your feedback! We’re glad you’re enjoying the product and appreciate your support 😊
David M.
Poonam tried to help me on a daily basis with trying to resolve my new Frontier Zone connection problems. After trying various instructions from Poonam, neither solved the problem, with either connecting with my Garmin 1030 plus cycling computer, or Frontier X on my Apple 16 Pro phone app. Eventually, I managed to solve the problem myself, by updating the software on the Frontier X app on my phone. This allowed me to connect with my Garmin computer and Frontier X app on my phone.
Response from Fourth FrontierMay 28, 2026
Thank you for sharing your experience. We’re glad the issue is now resolved and appreciate your patience throughout the troubleshooting process. Also happy to hear Poonam could assist you along the way 😊
Don
This device probably saved my life. The doctors were dismissing my concerns until I gave them hard evidence. The support group is really helpful. I gave them 4 stars for two reasons. One, the android app is buggy. Sometimes it connects to the chest strap connects right away, sometimes it doesn't. Sometimes the app is responsive and sometimes it freezes up. The other reason for losing a star is the marketing. I was under the impression that more features were available without a premium subscription. I am tired of tech companies always telling you all the great things they do only for you to find out it costs more money.
Response from Fourth FrontierMar 9, 2026
Thank you for sharing your experience. We’re really glad to hear that the device helped you capture data that supported discussions with your doctors, and that you’ve found the support team helpful. We also appreciate your feedback regarding the Android app and the subscription messaging. Your feedback has been forwarded to our team as we continue working on improving the app experience. If you ever need assistance, please feel free to reach out to our support team. We’re always happy to help.
Bruce G.
Fundamentally it should be and has been a great device, genuinely one of the best training tools I have used. I have owned both Gen 1 and Gen 2 and loved the previous interface. Had them for some time. However, the recent website changes have significantly reduced its usability. • Reviewing individual recordings is now much harder than it used to be • The new interface feels like a major step backward • It is far less intuitive to dig into specific results • Previously I could use a drop in heart rate or an algorithm flagged event as a cue to scan the corresponding ECG above on the same screen dragging my mouse across until the lined up • It was slightly clunky, but once you understood the workflow it worked well • Now premium locked features sit between the heart rate graph and the ECG view • You can no longer easily view both on screen together for interpretation That was the core value of the platform. Without seamless alignment between the heart rate graph and the ECG trace, the tool becomes dramatically less useful. In its current state, I cannot recommend it. The hardware remains excellent, but the software experience has undermined it. 2/2 stars for hardware, but in terms of outputs, its rendered very near useless in its current form, as its bit like pin the tail on the donkey to find the relevant 20 second strip. 1/3 for that for a total of 3, which is generous given the silly prices for this kit. Currently NOT good value at all. Best avoided unless this gets fixed. Edit 9/2. The interface appears to have improved.And I can now drag the HR graph to right below the ECG, as it used to be. This is much better. The frustrating "drag and zoom" function appears to have improved too. IT was allowing you to zoom on both x and y axis meaning it was very easy to lost perspective of the graph. This too has been fixed. Score adjusted up 1.
Response from Fourth FrontierFeb 9, 2026
Thank you for the honest and detailed feedback. We really appreciate you sharing this, especially given your long experience with both generations of the device. We’re sorry the recent interface changes have impacted usability — this isn’t the experience we want for our users. The team is actively working on improvements, and your inputs have been shared internally. One of our team members will also reach out to you directly to understand this better and help further. Thanks again for taking the time to help us improve.
Tom M.
After many emails, they replaced my device, but they did not provide a solution for the same issue recurring on the new device! Had my device for less than a year and it quit charging. Support did take it back to look at it and installed a USB c to magnet adapter. Now after 6 months the adapter has rusted due to perspiration and now has damaged the device internally. They offered to let me buy a new unit for a discounted price after their fix made my device useless! I would strongly suggest other options! I am using a WHOOP LIFETIME currently!
Response from Fourth FrontierJan 5, 2026
Thank you for sharing your experience. We’re sorry to hear about the inconvenience this has caused and understand how frustrating this must be. Our support team is here to assist you and will be reaching out to you directly to review your case in detail. For clarity, we do not carry out internal repairs. Under warranty, we always replace the device, and in your case, you may have received a replacement device earlier. We’d still like to review the details with you and see how best we can assist further. We appreciate you bringing this to our attention and look forward to connecting with you.
Srikanth K.
Fitness tracking with great leading metrics to track overall physical health . The premium features really help in tweaking ones fitness plans and . Very useful particularly for an aging body . HRV and VO2 max help in maximizing fitness and stress levels
Response from Fourth FrontierDec 12, 2025
Thank you for sharing this wonderful feedback! We’re really glad to hear that the Frontier X2’s advanced metrics—especially HRV and VO2 Max—are helping you track your overall health and fine-tune your fitness plan. It’s great to know that the premium features are adding real value, particularly as you focus on staying fit over time. We truly appreciate your support, and we’re always here if you ever need any assistance!
GIANLUCA C.
I am grateful with customer support that was able to help me sort out an issue I had. I erroneously synchronised activities into the cardiac rehab centre account I am trainining. Therefore they helped transfer the 2 activities from the cardiac center account to my personal account.
Response from Fourth FrontierMay 8, 2025
We’re so glad to hear that our support team could assist you and get everything sorted out smoothly! Thank you for your kind words—your feedback means a lot to us. Wishing you all the best with your training and recovery journey! 💪🙂
Kevin James W.
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.