Fourth Frontier Reviews 363

They sorted it out so I have adjusted the review.

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.

Quick background--I had been having some irregular heart beats during exercise and was looking for a way to investigate what was going on. Found the Fourth Frontier X2 online. I use it every time I workout now and also when I sleep. I have gotten a lot of great insight into my heart health and am quite happy with the product. The X2 is helping me and my doctor manage my newly diagnosed Atrial Fibrillation.

--The Heart Strain indicator is quite helpful. I have had the "buzz" on the device go off a couple of times. It tells me to lower my workout intensity.
--The heart rate is accurate--as compared with my Polar H10 strap and several manual counts.
--Breath rate is helpful information not supplied by other heart rate devices
--The HRV reading is helpful and compares very close to my Oura ring.
--Sleep data is impressive and compares very close to the Oura ring.
--The X2 could easily take the place of the Polar H10 strap and Oura ring.
--The App is intuitive and provides a lot of useful information.
--I love that the app will generate a PDF of the ECG that can be emailed to your cardiologist/doctor.
--I love that the X2 is charged via USB instead of a battery like the H10.
--Battery life is impressive--I have worn it all night while sleeping followed by 3 hours of use during exercise and have not gone below 70% charge. I once wore it for 18 hours and only got to 60% charge. The X2 charges in just a few minutes-much faster than my Apple watch.
--My cardiologist was enthusiastic about my use of the X2. He found the ECG data useful--especially because he could see what was happening during a specific activity. I had worn a 2 week monitor through him--but of course I didn't have any weird beats until after I turned in his device. The X2 ECG is helping to guide my treatment.

If you want to really learn about your heart health and what impact it, this is the device. I’ve used many health devices, and they all more or less give you the same data. While that data is informative, I wanted deeper insights into my heart health and Fourth Frontier does this better than any device I know. Yes, it’s on the pricier side and I was reluctant about that, but the great thing is that you can get a full, one-on-one demo. I talked with Vijay Kumar who took the time to walk me through what it does, answered all my questions, and made sure the device is a fit for my needs. I was looking for a device that would give me all-day readings, and he showed me exactly how it could do just that. So, the purchase was seamless. I never felt rushed or pressured. The device itself far outdid my expectations. I was nervous about whether the battery would give all-day readings, and it does. The readings give me much better insights into my heart function than any device I’ve tried. What’s even better is that you get a consultation with a real healthcare professional who helps you understand your readings. I learned more in that session than months and years of data from other sources and/or doctor visits. Both the mobile device and the desktop dashboard give you a lot of insights. Finally, in just the few months I’ve owned this device, they have updated and added features and services so that the device and the information continue to improve. As someone who loves to try out new tech and learn about my health through insights, I’m super impressed!

I've had lots of exercise monitors over the years but was looking for one with multiple and extensive features. The Fourth Frontier X2 is an excellent monitor providing me with all the stats I'm interested in for a heart monitor...as well as special features such as an indication of VO2 Max (with the premium membership). Also, customer service has been excellent vie email whenever I've had a question.

I can't find information on, what you call, 'Noisy signal/Not interprable 'Grey background'. The instrucion-picture does not show the 'Grey background' I find in my grafics?
Noisy signal can be an Technical matter or an Hartmatter or both!? I see this grey background on a regular base. I know the meaning of flags in the grafics. I have them alwais! That's wy I bought this device.

Placed order more the 2 weeks (delivery 3-5 days). Contacted via Live Chat. They would investigate and contact me back (no response for almost a week now) Filled in contact form... nor response. Not even that they received the form or that they would investigate.

Very poor customer support. On the product(s) itself I cannot comment, because I have not received them. But hey... they got the money. So why would they care...

The Frontier X is an excellent product, backed by a team that listens to its customers and responds promptly—a refreshing approach in today’s market. It may be the best heart rate monitor for fitness enthusiasts.

Not sure where all these other reviews have come from but in general, for a device that costs in excess of £350 - it's very poor.

I use the HRM for variety of exercises - mainly treadmill running, HIT and kickboxing. My main concern and issue is the amount of 'noisy rhythm' that gets reported, generally resulting in a useless and overpriced HRM unfortunately.

My past 4 activities have resulted in 27%, 40%, 30%, and even one activity had 80% noisy rhythm.

Customer service informs me of the usual tactics to ensure contact, proper position etc. But the amount of items that can seem to interfere with this device is crazy. Zips or metal on your workout gear, even static generated by your clothing can cause interference. For a device that costs this much, that is just plain ridiculous.

Back to Garmin and Polar it is.

The sales pith was good. But after the sale was supposed to get done furyher assistance re set up and setting parameters. Also called technical support. This was call centre in India, said they would email me the answer. No response for weeks. Device also gives spurious readings. Would not recommend

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.

So far, so good. My device has worked well and the couple times I have encountered an issue, Fourth Frontier customer service has been extremely responsive. The device has integrated well with my Garmin and I have been using it on every ride. Although I purchased it after having an episode of suspected afib on a ride, I have not had anything similar since, so I have not had the occasion to share my ECG data with my doctor. However, I will take that!

My device stopped working and they exchanged it for a new one instantly. Fourth Frontier 2 has given me the confidence to get back to peak training.
After an unfortunate heart event in 2022, I started using this device and I will be doing Ironman Copenhagen in 2025 with my Frontier 2.

I've had the X2 for nearly 9 months and it's been a really effective addition to my training regime. That said they say the best test of any company is when something goes wrong.

Sadly my device has developed a fault and for the last month I've been batted around various customer service departments with promises of fixes and resolution of my problem. I'm now into my fifth week of not being able to use my device and once again another generic reply to my email stating it's been passed up and expect a reply in the next 24-48 hours

Seriously. This device cost a fortune. Stand by your product and deal with problems in a timely way that resolves the issue for the customer

Classic generic reply from Fourth Frontier on here. I'm already in direct contact and getting nowhere hence the negative review. Happy to take a small fortune for the device - less keen to replace one that hasn't worked for five weeks

I have had the X2 for a few weeks and I love it, both as a physician and as an athlete! The set-up is quite straightforward and I was able to see a streaming EKG within minutes. I like the many automated features such as % of time with normal v. 'other' heart rhythm, especially during longer collection periods. Use during extreme physical activity is also very good- a few occasional 'noisy' periods but overall very good. Additionally, not requiring your phone (or any device) to be close by is also an important feature. Once you have your phone available, it will simply synch at that time. Downloading the complete EKG to my laptop as a PDF file is a critical and very useful feature, especially when I want to share the tracings with others. I also found the technical support to be excellent: Jayadev was affable, available and very capable. Kudos to Frontier for a great product!

Vijay did a great job explaining the device and answering my questions prior to purchase.

It helps me to know real time understanding of my internal dynamics

The customer service prior to buying the device was awesome. They answered all of my questions and set up a phone call with me. After I purchased the device, they offered me another call to go over things in more detail. The device itself has a very nice form factor is completely comfortable. I wore it for a four hour endurance race. I even got some mud underneath the electrodes, but was able to wipe it off with my finger and continue to get solid readings for another two hours. The amount of data that you get is very valuable. It’s also excellent feature to be able to feel a vibration on your chest when you are pushing your heart past where you want to be The live ECG function works very well. It is limited to one hour but for most applications I think that is completely reasonable. I streamed the first hour of my race to my friends and my wife just to see how the data came through. I charge the device once and I use it six or seven hours of training , the sinking is very fast happens automatically and wirelessly. I would like to see some more activity types or to be able to put in my own activity type that I can save in the app well worth the price highly recommended I am going to try to get all of the athletes on my team on this tech .

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.

Fantastic device. I’m a physician and aging competitive athlete. I’ve used many devices to track and monitor health and performance over many many years. Some good, many junk. The Frontier X2 itself, the presale education, post sale technical and health reviews and education are perfect and outstanding. Looking forward to even better insight and tracking my health and performance over the coming years with the Frontier X2.