Comparison

Frontier X vs Hilo Core

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Frontier X

Track your heart health and exercise performance with a smart chest strap monitor. Gain detailed insights into heart rate, rhythms, and training load. Receive personalized feedback and alerts to optimize your workouts and understand your body better.

Highlights
  • Heart Health Monitoring
  • Real-time Heart Rate & HRV
  • Breathing Rate & Strain Tracking
  • Activity Recording (24hrs)
  • Personalized Vibration Alerts
  • AI-enabled Training Insights
  • Metabolic Profile Analytics (Premium)
Features
Read full description

With your Frontier X/X2, 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 - 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 - 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.

About

Hilo Core

This app monitors your cardiovascular wellness by collecting numerous readings throughout the day when paired with a wearable device. It provides personalized insights into your sleep, activity, and heart rate patterns to help you understand and manage your long-term health.

Highlights
  • 24/7 cardiovascular wellness monitoring
  • Personalized insights on sleep, activity, and heart rate
  • Detailed timeline comparisons
  • Medication tracking
  • Access to complete blood pressure history
  • Add personal notes to measurements
Read full description

Hilo Core – Your Everyday Cardiovascular Wellness Companion HARDWARE REQUIRED The Hilo Core app works only with the Hilo Core wearable device, which is sold separately. The app cannot function or provide any insights without the device. Please ensure you have the Hilo Core wearable before installing. ―――――――――――――――――――――――――――――――――――――― EFFORTLESS 24/7 CARDIOVASCULAR WELLNESS MONITORING Step into a smarter way to understand your cardiovascular wellness. Paired with your Hilo Core wearable, the app captures approximately 50 readings in 24 hours — lightweight, comfortable, and designed to fit seamlessly into your life. Gone are the days of relying on a single snapshot: Hilo Core gives you a full picture of your wellness trends over time. For us, it's about translating decades of research and billions of data points into clear, meaningful insights. For you, it's about the peace of mind that comes from truly understanding your wellbeing. With Hilo Core on your wrist, you can keep your health in focus. EMPOWERED WELLNESS MANAGEMENT Hilo Core goes beyond simple readings, transforming how you think about your health. Discover how your sleep, activity, and heart rate connect to your patterns day to day. With personalised insights built around your habits, you'll gain a much deeper understanding of how your lifestyle and daily choices affect your wellbeing — and feel empowered to make better decisions for your long-term health. BACKED BY SCIENCE, BUILT FOR YOU Hilo Core is grounded in over 20 years of research and a vast database of 12 billion data points, built around your unique profile and trusted by users around the world. ALWAYS ON, ALWAYS WITH YOU Hilo Core is designed for your life as it actually is. With Hilo Core on your wrist, you get personalised insights across wellness, sleep, steps, and heart rate — helping you understand your patterns, not just record them, so you can make confident, informed decisions about your health every day. ―――――――――――――――――――――――――――――――――――――― HILO CORE MEMBERSHIP Hilo Core Membership is an auto-renewable annual subscription that unlocks premium features within the app. The first year of membership is included with every Hilo Core device purchase. Membership includes: • All past readings – Access your complete blood pressure history at any time. • Detailed timeline comparisons – Compare measurements and trends across different time periods. • Notes – Add personal notes to measurements and events to better understand your data. • Medication tracking – Track medications alongside your readings to better understand their impact over time. SUBSCRIPTION INFORMATION • Hilo Core Membership is billed annually. • The subscription automatically renews unless cancelled at least 24 hours before the end of the current subscription period. • You can manage or cancel your subscription at any time in Settings > Apple ID > Subscriptions. ―――――――――――――――――――――――――――――――――――――― IMPORTANT DISCLAIMER The Hilo Core app and Hilo Core wearable device are intended for general wellness and informational purposes only. They are NOT a medical device and are NOT intended to diagnose, treat, cure, mitigate, or prevent any disease or medical condition, including high blood pressure (hypertension) or any cardiovascular disease. The readings, trends, and insights provided are not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare professional regarding your health, and never disregard professional medical advice or delay seeking it because of information provided by this app. Hilo Core is not intended for use by individuals under 18 years of age, by pregnant women, or by people with known cardiovascular conditions without consulting a healthcare professional. If you are experiencing a medical emergency, contact your local emergency services immediately. Terms of Use: https://hilo.com/uk/terms-conditions/

Screenshots

Frontier X4 screens
Hilo Core4 screens

Verdict

The call

The clearest difference is ratings volume: Frontier X at 317 against Hilo Core's 3. Frontier X also leads on rating (4.6 vs 4.3). Hilo Core's advantage is update cadence (weekly vs every 3 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Frontier X sells 2 in-app purchases, starting at $14.99 per month and Hilo Core sells 1 in-app purchase, starting at $149.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Frontier X holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Frontier X has 317 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Frontier X ships an update every 3 weeks, Hilo Core weekly. The most recent releases landed on September 29, 2026 and September 28, 2026 respectively.

Scorecard3 real differences · 7 level
Frontier X versus Hilo Core: the parameters behind the verdict, then further details
ParameterFrontier XHilo Core
PriceFreeFree
Rating4.6 (317 ratings) — better4.3 (3 ratings)
Positive reviews81.8% of reviews—
Number of ratings317 — better3
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS16.016.0
Further details — not scored
Size571 MB227 MB
Age rating4+4+
DeveloperFourthfrontieraktiia SA

Customer experience

Frontier X

All ratings317 ratings
Positive90.9%
Neutral1.3%
Negative7.9%
Written reviews137 reviews
Positive81.8%
Neutral1.5%
Negative16.8%

Hilo Core

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%

Bugs and requests

Frontier X

Reported bugs

4 issues
  • ECG stopped working
  • Inaccurate breathing rate and other metrics
  • Inability to edit activity details for indoor workouts
  • Syncing issues with Garmin devices after firmware updates

Requested features

6 requests
  • Add interval markers
  • Improve integration with Apple Fitness/Fitness+
  • Add support for ANT+
  • Improve compatibility with other fitness apps and devices
  • Add more customization options for workouts
Show 1 more
  • Improve data visualization and analysis tools

Hilo Core

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Frontier X

Subscriptions2
  • Monthly7 Days trial$14.991 Month
  • Yearly7 Days trial$119.991 Year
1 purchases

Hilo Core

Subscriptions1
  • Hilo Core Membership$149.991 Year

Questions

Is Frontier X free?
Frontier X is free to download, with in-app purchases available.
Is Hilo Core free?
Hilo Core is free to download, with in-app purchases available.
Which has better reviews, Frontier X or Hilo Core?
Frontier X is rated higher. Frontier X averages 4.6 out of 5 from 317 ratings, while Hilo Core averages 4.3 from 3 ratings.
Do Frontier X or Hilo Core have ads?
Neither Frontier X nor Hilo Core shows ads.
Which is updated more often, Frontier X or Hilo Core?
Frontier X ships an update every 3 weeks, and Hilo Core weekly. Most recently, Frontier X was updated on September 29, 2026 and Hilo Core on September 28, 2026.

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