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.

I'm happy with my Frontier X2. My training is safer and I can improve my performance in a healthy way. I can also take benefit from the biomechanical parameters like Cadence and Body Shock. There are a lot of useful information in the App and the Webpage. The support is excellent!

I have had a frontier x2 for over a year. This company has been great with any problems I had with an excellent after sales customer service.

Nice experience here.

So far, the experience has been very good. However, I have one request. Integration is required for the Samsung Health app and Samsung watch. We don't need to carry a bulky phone if we have the app on the Samsung watch.

The Fourth Frontier X2 is an incredible piece of kit. I've been seriously impressed with the quality of the data, as has my cardiologist who is happy to use it for diagnostics & monitoring. The customer support from the team has been second to none with any questions or issues addressed very quickly and in a personal manner. The monitor itself is really comfortable to wear and nowhere near as big as I had expected it to be (it's not much bigger than a standard chest Wahoo or Garmin monitor). Overall I think this is a great piece of kit looking for a deeper look at heart health. To get the most out of it you do need to have an understanding of ECG's or someone to interpret it, but definitely worth it.

This is a great device. Links easily to my Garmin. It’s been very reliable, but I had a minor issue lately and found the customer support was very engaging with a very prompt reply.

Nice product

Honestly the frontier x2 is a great product. It just does something no other product out there can do (continuous ecg), and imo only for that it’s worth it. But also the product is easy to use (I linked it to a wahoo element bolt zero issues), the app is good, and the support is amazing (they even offer me some beta tools they are developing now). All in all for anybody interested on more data about the heart this is a must have, I wish I found about it before.

I highly recommend doing a virtual meeting if you are considering purchasing. It was extremely informative. I am a Sports Medicine Physician who is also a competitive rower/runner with heart issues. This is a highly unique ECG monitoring device. ECG recording while exercising is not normally possible except in a lab. This is an amazing breakthrough in wearable technology. I am really looking forward to receiving my Frontier X2. They also have a sports bra so the difficulty of wearing a chest strap plus a sports bra is alleviated. Amazing!!

I have only just received my Fourth Frontier Monitor and am trying to use it properly to ensure I get accurate results. I had a query and decided to contact Customer Service and was very pleased to get a quick response which is very important to a first time user. The knowledgeable response to my question, answered by Customer Services agent Poonam, was written in a simple and understanding way and which provided me an easy to understand solution. Early days in ownership but a very swift and positive interaction which was greatly appreciated. Allen J Gawne 🇮🇲

Very quick from order to receipt, very easy to get started and it links well with my Garmin (which other sensors have not). Battery life is great and it is really useful to see the percentage battery level on the display. I also like the fact that you can email directly to real people and you get quick responses!