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
About these reviews
Replies
The company replied to 97% of reviews.
Latest
Most recent review: October 2026.
Edits
Reviews are shown as their authors wrote them. The company can reply, but cannot edit them.
Score
This company cannot pay to remove reviews or change its score.
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.
MC
Mr Ciaran J.
Good product
Avoid this company.
They potentially have a great product if they could sort out these issues, poor quality materials, bugs in the software and poor customer service.
I bought my unit in August 2023 and generally it was ok, it started to go wrong in January 2024. The customer service team refused to acknowledge that there was an issue and kept sending me the same instructions to reboot the unit, which worked for a day or two, but this became tedious.
Finally after 5 months of no action from them I managed to get them to agree it was a faulty unit and to replace it.
The replacement unit worked fine for 3 months and now it wont charge using their bespoke charging cable.
As I am over 12 months from original purchase, even though the replacement is 3 months old they wont replace the cable.
They are a very difficult company to deal with if you have an issue, they won’t accept the problem is with their equipment.
Update, since this review they have resolved the issue by sending out the replacement cable.
Response from Fourth FrontierOct 10, 2024
Thank you for taking the time to share your feedback. We genuinely apologize for the difficulties you've encountered with your unit and our customer service. We appreciate your patience throughout this process, and we want you to know that your experience is important to us.
We’re glad that you received a replacement unit, but we’re disappointed to hear it is now facing charging issues.
To ensure we address your concerns effectively, we will escalate this matter internally and have a dedicated team member reach out to you shortly. Our goal is to provide you with the support you need and find a satisfactory resolution.
Thank you for giving us the opportunity to improve, and we look forward to making this right for you.
NY
N Y.
Really great idea and design and simple…
Really great idea and design and simple to use but just not quite there... Connectivity drop outs are constantly a problem with devices or will not sync with other third party apps. Heart rate while running is wildly and regularly off target compared to polar (easy zone 2 runs regularly register 180 BPM periods then drops to 0 and I can't tighten the strap anymore as advised!). Sadly end up returning to using polar straps which is a shame as the extra heart Information is a big selling point. Hopefully they will improve.
Response from Fourth FrontierSep 6, 2024
Thank you for your feedback and for sharing your experience. We’re sorry to hear about the connectivity issues and inaccuracies you’ve encountered. Our customer support team will be reaching out to you shortly to assist with these problems and help resolve the syncing and heart rate issues. We appreciate your patience and hope to improve your experience with our device. Thank you for giving us the opportunity to address this!
KM
Keith M.
Plus and minus points.
What a great device when using on my iPhone in isolation from any other device
The big downside, however is be wary as it won’t work /!connect with with Zwift or wahoo via ant+ / Bluetooth which is a huge downside if you are seeking a divine for sport.
Response from Fourth FrontierJan 29, 2024
Thank you for sharing your insights and experiences with the Fourth Frontier device. We're glad to hear that you find it useful when used independently with your iPhone.
We understand the importance of compatibility with other devices, and we appreciate your feedback regarding connectivity issues with Zwift and Wahoo via ANT+ and Bluetooth. Our team is actively working on enhancing device compatibility and addressing such challenges. We're committed to providing regular updates and improvements to ensure a seamless experience for our users.
If you have any specific details about the connectivity issues you encountered, or if you'd like further assistance, please don't hesitate to reach out to our support team at [email protected]
We appreciate your valuable feedback and look forward to continually improving our device based on user experiences like yours.
BE
Benjamin
Not reliable, very poor service owned for 2 years
I purchased an X1 in November 2021 after a heart scare. At 1st i was impressed but within a few weeks the issues crept in and then the device broke within a year even with light indoor-only use. A replacement X2 was sent out as it was still within warranty however 13 months after getting the replacement (by which point i was using the strap very infrequently due to numerous issues) the same issue happened with the X2 where it pretty much fell apart within the monitor. Customer service have taken 5 months to tell me there is nothing they will do as it's out of warranty now so I'm left with a useless bit of kit which I'm unable to repair or recycle and it's been a complete waste of money. The app works poorly, the device doesn't appear to have a way to switch off so i ended up having to charge it before each use, the data refresh was unacceptable when i 1st got it but has improved with software updates since. Beware the claims of intelligent analysis of your workouts, the feedback is very very basic and gives no real insight in to your fitness or training. Edit: since writing the review here the company reviewed my issue and provided a replacement.
Response from Fourth FrontierJan 10, 2024
We sincerely apologize for the challenges you've faced with our FX and FX2 devices, and we appreciate you taking the time to share your experience. It's disheartening to hear that the products did not meet your expectations, and we understand the frustration this has caused.
We regret any inconvenience caused by the issues you encountered with the devices, especially after a replacement was provided. We take customer feedback seriously, and we are continually working to improve our products and services.
Once again, we apologize for the inconvenience and appreciate your patience as we work towards enhancing our products and customer support.
MT
Mrs Teresa S.
Not for me
I initially wrote a review giving this a one star. It was reliable in its unreliability and I had difficulties getting through to customer service. Customer services did eventually get in touch and were as helpful as they could be. They sent out a second device, which unfortunately still had issues. Following a software update, these do seem to have been resolved apart from the issue of the app not showing the correct battery level when the device is recording.
That said, I'll review how the product works (or not) for me. The marketing seems to aim at both the extreme fitness community (of which I'm not able to comment on the appropriateness of the device), and the heart health community. When I purchased the device I was looking for something that could record ECGs for 24 hours. I liked that it also recorded my breathing and at first glance, it seemed to identify any arrythmias which was important for me. I have now given it a good try. The recording is now reliable and I can download 3 hour episodes of ECG on PDF which is useful. When I took these to the cardiologist he questioned whether there was any arrythmia identification or was it just left up to me to guess what was important. This is where the device falls down. I had a Kardia device which would identify specific arrythmias, but was limited to a 5 minute recording when sat still. This device does seem to do a lot, but why there is no AI interpretation of arrythmias, I don't know. What it picks up as different beats are usually normal ectopics but it seems to miss other issues such as atrial flutter, AF, SVTs etc. I don't want to become an ECG expert to know when something needs bringing to a cardiologist. I expect the device to pick these things up and inform me, which this doesn't. For me, I'm not sure this device gives what I need. Perhaps it should focus on the fitness market alone.
Response from Fourth FrontierJan 10, 2024
The issues you've described are certainly not typical of our products, and we appreciate you bringing them to our attention. We deeply regret any difficulty you had in reaching our customer service team. This is not the experience we want our customers to have, and we are actively addressing our support channels to ensure timely and effective responses.
Additionally, we understand your decision to seek a refund, and we are committed to assisting you through the process. Our goal is to ensure your satisfaction, and we appreciate your patience as we work towards resolving this matter to your full satisfaction.
CU
Customer
The device doesn't always connect to…
The device doesn't always connect to the app. Secondly the ecg reports can be difficult to understand. Lastly the battery life is quite weak.
Response from Fourth FrontierFeb 22, 2023
Thank you so much for sharing your valuable feedback. We sincerely apologise for all the inconvenience caused to you.
We would like to inform you that customer satisfaction is always been a number one priority for us. We are always trying to improve our product to provide you with a better experience.
We would like to let you know that as a conscious effort to reduce our carbon footprint, we do not provide the charging brick. The charging cable you have received is compatible with any USB plugs on a laptop or computer. The charging brick itself if you would need to purchase it is the 0.5 Amp/5 Volts as advised.
Depending on your usage, the battery life of your device may vary:
1. A fully charged Frontier X2 can last 24 hours in Monitor Mode.
2. Your fully charged Frontier X2 can last for approximately 14 days if used for an average of 1 hr/day.
3. Your fully charged Frontier X2 can track a maximum of about 24 hours of activities before you need to download your data to the app and charge the device.
4. For optimal usage, we recommend charging your Frontier X2 when the battery level goes below 20%.
We will pass your suggestion to our team as how we can improve our process further. Please reach out to [email protected] with you contact details so we can reach out to you as soon as possible and we will be happy to help
VI
Vincent
There should be more Information on…
There should be more Information on the artefacts, what the mean.
Response from Fourth FrontierNov 23, 2022
Hi Vincent, we're very sorry to hear you're disappointed with the information on our website. We're constantly updating our FAQs and Knowledge Base. Please refer to this https://support.fourthfrontier.com/article/the-data-my-frontier-xx2-device-provides-is-either-inaccurate-or-poor-how-do-i-fix-this on how to get good data quality from your device.