Frontier X

With your Frontier X/X2/X3, track your 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/X3 - a revolutionary chest strap wearable smart heart monitor and view your recorded data.

Trusted by world-class athletes across the globe, the Frontier X2/X3 is a chest-worn Smart Heart Monitor that provides in-depth real-time feedback on your heart health.
It can monitor your:
- Heart Health
- Heart Rate
- Heart Rate Variability (HRV)
- Breathing Rate
- Strain
- Rhythms
- Training Load
- Calories
- Stress, and a lot more.

• Accurately record your activity like exercise, running, cycling, resting, sleeping, meditation, etc for up to 24hrs with 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.
• 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.
• Frontier X integrates with HealthKit to export your Frontier X activities into the Health app and to read heart rate and biometric data.
• IP67 Waterproof up to 1.5 M
• Battery: 14+ days of typical use


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 VO₂ Max data. While other wearables estimate using motion and heart rate, our advanced algorithms provides precise VO₂ Max readings outside of a lab, tracking cardiovascular efficiency and endurance potential.

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

Sleep Stage Analysis: Get a comprehensive understanding of your sleep quality (Webapp).

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


*A Paid Frontier Premium subscription is required to access the full feature set .
The Premium feature subscription comes with a complimentary 7 days free trial, and continue at a minimal monthly cost starting from USD 14.99, or opt for an annual plan for substantial savings. Please note that prices may fluctuate based on your geographical location, currency, and current exchange rates

The Terms of use are available in the app and our website: https://in.fourthfrontier.com/pages/terms-of-use


About Fourth Frontier
Fourth Frontier is an innovative health-tech company focused on revolutionizing heart health monitoring with its cutting-edge wearable 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 iPhone and Apple Watch.