4.4
302 reviews
5K+
Downloads
Content rating
Everyone
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About this app

With your Frontier X/X2, track your ECG during any activity including exercise, rest or sleep to get detailed insights on heart health and exercise performance. This companion app allows you to connect with Frontier X2 - a revolutionary chest strap wearable smart heart monitor and view your recorded data.

Trusted by world-class athletes across the globe, the Frontier X2 is a chest-worn Smart Heart Monitor that provides in-depth real-time feedback on your heart health. It can monitor your

Heart Health
24/7 Continuous ECG
Heart Rate
Heart Rate Variability (HRV)
Breathing Rate
Strain
Rhythms
Training Load
Calories
Stress, and a lot more.

● Accurately record continuous ECG for up to 24hrs during any activity like exercise, running, cycling, resting, sleeping, meditation, etc for comprehensive heart health insights.
● Spot changes in your heart health with Rhythm and Strain.
● Train in the right zone without distractions with real-time, personalized, and discreet vibration alerts.
● Add health event tags to help you understand how lifestyle choices and behavior affect your health.
● Generate PDF reports of your ECG and securely share it, along with other health metrics, with anyone worldwide.
● Seamlessly integrate with Bluetooth-enabled wearables and third-party devices such as GPS sports watches, bike computers, and more.
● AI-enabled algorithms - Receive post-activity training insights, recommendations, and weekly goals.

Now get deeper insights and data with Frontier Premium Subscription*:


Metabolic Profile Analytics: Track training intensity and the impact of lifestyle changes on metabolic health with key metrics like VO2 Max, VO2 Zones, Oxygen Uptake, and Ventilatory Thresholds (VTs).

VO2 Max: Get the most accurate real-time VOo2 Max data. While other wearables estimate using motion and heart rate, our continuous ECG provides precise VOo2 Max readings outside of a lab, tracking cardiovascular efficiency and endurance potential. Unlike wrist-based devices, our 24/7 ECG-based system consistently captures your heart's electrical signals, offering reliable data.

Readiness Score: Determine if your body is ready for peak performance or needs recovery. Advanced algorithms use heart rate, heart rate variability (HRV), and ECG data to guide your daily activities and training.

Sleep Stage Analysis: Get a comprehensive understanding of your sleep quality. Our system uses continuous ECG to track heart patterns and sleep stages.

With Frontier's Premium subscription and Metabolic Profile Analysis, tracking your VO₂ max becomes simpler and more precise.


About Fourth Frontier
Fourth Frontier is an innovative health-tech company focused on revolutionizing heart health monitoring with its cutting-edge wearable ECG technology.

We are the World’s First Smart Heart Monitor. With over 5 billion heartbeats recorded from 120,000+ users across 50+ countries, we are empowering users to understand and manage their heart health in real-time.

These features make the Frontier App a comprehensive tool for heart health management and fitness improvement.

Download the app today and access the most accurate heart health data available.
Apps available for iOS, Android, and Apple Watch.


*A Paid Frontier Premium subscription is required to access the full feature set .
Updated on
Mar 16, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.4
290 reviews
Dj Rocco
March 30, 2022
ONLY WORKS WITH THERE MONITOR, This app is fantastic... The only thing wrong with it is that It doesn't show your calories. It's more of an app for your ECG and heart information. I've talked to the company they said they're going to put calories in it eventually, describing if you're in a anaerobic, aerobic, cardio state depending on your age and the information you put in the app. SAD but it's just the way it works It only updates every 10 seconds! They say it's necessary for the ECG function.
Did you find this helpful?
Fourth Frontier Technologies Private Limited
April 14, 2022
Hi, We've forwarded your feedback to our developers. Thank you for taking out the time to send us your suggestions!
Courtney N
May 9, 2023
The app has been bugging me lately. It keeps kicking me out and saying my user doesn't exist. The first time it did this, it caused my whole app to mess up. It doesn't let the actual ecg of your activity pop up till days later now and you have to keep the device itself consistently on and running just to eventually get the app to register previous activities? Which is dumb. When it's processing to sync, it should automatically be syncing up for the ecg, not waiting till a week later.
2 people found this review helpful
Did you find this helpful?
Fourth Frontier Technologies Private Limited
May 15, 2023
We are pleased to inform you that the issue you encountered has been resolved in the latest update of our app. We kindly request you to update the app and experience the improvements firsthand. We would greatly appreciate it if you could reconsider your rating based on the updated version. Thank you for your continued support and valuable feedback.
Patrick T
July 22, 2024
This app just ended my workout and erase my workout just because I set it down in during a res in the most intense part of the workout. Probably the most important part to record. My heart rate was so high, I ended up laying down in the grass unfortunately the blades of grease touched the end button. It really needs to be at the bottom of the screen . . . After all you have to scroll down to see that, maybe scroll for end too (or confirm button) same with erase workouts from device.
Did you find this helpful?
Fourth Frontier Technologies Private Limited
August 19, 2024
We are really sorry for the trouble and we appreciate you bringing this issue to our attention. We will look into this further!

App support

Phone number
+919820807620
About the developer
Fourth Frontier Technologies Private Limited
abhishek@fourthfrontier.com
2nd And 3rd Floor, 794, 1st Cross, 12th Main Hal 2nd Stage Indiranagar 12th Main Road Bengaluru, Karnataka 560038 India
+91 98865 92496

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