Fintan H.
APPALLING Customer Service
I still have not received my order. Its been over a month since purchasing. I've contacted them on numerous occasions and still the order has not been processed. Appalling customer service.

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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Fintan H.
I still have not received my order. Its been over a month since purchasing. I've contacted them on numerous occasions and still the order has not been processed. Appalling customer service.
Paul F.
Had a problem with email as I changed my address and started to get it sorted with FF customer service support. I did minor follow up for months but when reconnected with FF they had my history and helped resolve the issue. Contacting me regularly to ensure I understand what to do. Excellent service great personal touch
Patrice G.
I own a first-generation Frontier X, which has served me well for several years. Unfortunately, the chest strap eventually stopped holding the device securely, making it impossible to use during exercise. Although my device was well outside its warranty period, I contacted Fourth Frontier’s support team to see if they could help. After reviewing my case, they kindly offered to send me a replacement chest strap completely free of charge, including shipping to France. I’ve now received the replacement, and it works perfectly! A special thank you to Sahid for his professionalism, kindness, and excellent communication throughout the process. It’s refreshing to see a company that genuinely values its customers, even years after the original purchase. Excellent customer service and a very positive experience. Highly recommended!
HARISHIVAN VAZHI T.
item has not been delivered yet even after 14 days.. terrible experience
Rakesh M.
I have been using Frontier X and recently purchased Frontier Plus, expecting a significant improvement in performance, accuracy, and monitoring capabilities. However, based on my experience with both devices, I am disappointed with the performance of Frontier Plus. My concerns are as follows: 1. No significant improvement over Frontier X: Despite being a more expensive product, Frontier Plus does not appear to offer a meaningful improvement in actual monitoring results. The main differences I have noticed are in the software and app experience rather than the quality of the results. 2. Inconsistent or inferior results: In my experience, the results from Frontier Plus have been worse than those from Frontier X. This raises concerns about the consistency and reliability of its measurements, particularly when compared with a device from the same product range. 3. Ambulatory monitoring claims: Frontier Plus is marketed as an ambulatory monitoring device, which led me to expect dependable results during real-world, day-to-day use. However, my experience has not met those expectations. I would like to understand how Frontier Plus is validated for ambulatory monitoring and what measurable advantages it offers over Frontier X. 4. Price versus performance: Frontier Plus is considerably more expensive, but I have not experienced a corresponding improvement in performance. A higher price should be justified by demonstrable improvements in measurement quality, reliability, and functionality—not primarily by differences in the app or software. I request that your technical team investigate these concerns and provide a clear response to the following questions: - What specific improvements in measurement accuracy and reliability does Frontier Plus offer over Frontier X? - Why might Frontier Plus produce worse or different results than Frontier X under comparable conditions? - What validation data supports the ambulatory monitoring capabilities advertised for Frontier Plus? - What tangible benefits justify the significant price difference between the two devices? I purchased Frontier Plus expecting a genuine upgrade, but my experience so far has left me questioning whether it offers sufficient practical value over Frontier X. I would appreciate a technical explanation addressing these specific concerns, rather than a general description of the product's features. Regards, A concerned customer
Jonathan G.
I ordered the product. It would not connect to garmin, or to the app. I called the compnay. DELAY tactics....I had wait a few days to "Schedule a call" to talk about "it." Then, after that non-productive call, I had to a few days to schedule a "tech" call. That did not solve the problem. The company admitted through their data that the product was defective. They said return the device. However, they did not on their site provide any information regarding the return address. So I emailed them. A few days later, I was given a "return label." I took it to the post office, and they said "That is not a return label." So I had to purchase a box, envelope, tape, label, and pay 17 Euros to return it. I told them about this and they said essentially "Sorry." We will look into this This is a FRAUDULENT COMPANY THAT DOES NOT STAND BEHIND IT'S PRODUCT. As you can see from their response below, it is a rote"Sorry about your experience." But their response clearly validates my concern.....more DELAYS as "someone will look into this." I have asked now at least 5 times to fully refund my money as I returned the item clean, never used, undamaged.
Response from Fourth FrontierSep 24, 2026
We’re really sorry to hear about your experience. This is certainly not the experience we intend for our customers, and we sincerely apologize for the inconvenience and frustration caused throughout the process. The issues you encountered with the return label and shipping process may have been due to a logistics-related issue, which our team is currently investigating to understand what went wrong and ensure it is addressed appropriately. We would like the opportunity to resolve this to your satisfaction at the earliest. One of our team members will be reaching out to you shortly to assist you directly and work towards a resolution. Once again, we sincerely apologize for the experience.
Brett L.
First off let me say that this device was of significant value as I made my 6000 mile bicycle ride across America. Particularly in the desert and the humid southeast or have me the information I needed to ensure I maintained my health even while enduring those conditions. In addition when I had questions about the device my queries were answered quickly and honestly. Thank you Fourth Frontier. Brett from ride for vets.
Response from Fourth FrontierSep 17, 2026
Thank you for sharing your incredible journey, Brett! We’re glad the device could support you throughout your 6,000-mile ride and provide useful insights along the way. We truly appreciate your kind words about our support team and wish you many more great rides ahead! 😊
Vinoth Kumar S.
The product is really good. But costly but it has the features worth the money. The belt was made to buy extra unnecessarily and there is no possibility to return it via the store. But after writing to the customer care Sneha helped me with returning the belt and refunded the money. So customer service is good too.
Response from Fourth FrontierSep 7, 2026
We’re sorry to hear about your experience. We’d like to better understand your concern regarding the belt and the return request. One of our team members will be reaching out to you shortly to review this and assist you further.