Comparison

Frontier X vs Elonga

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/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.

About

Elonga

This app uses daily morning measurements of your body's immediate condition via HRV to suggest an optimal activity level. Consistent use refines predictions, revealing long-term trends and personalized exercise recommendations.

Highlights
  • Daily morning measurements
  • HRV method for body condition
  • Individualized activity level suggestions
  • Refined predictions with consistent use
  • Long-term physical activity trends
  • Optimal exercise level identification
Features
Read full description

Using daily morning measurements, we collect data that individually measure your immediate body condition using the HRV method and safely shows you what level of activity your body is ready for. With consistent daily measurements, the app's predictions are refined and individualized. Gradually, the longer-term trend of your physical activity and the level of exercise that is optimal for you is revealed. Order our device wearable device: https://www.elonga.com/en-us Elonga is a wellness and lifestyle application. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The information provided is for general wellness and informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Screenshots

Frontier X4 screens
Elonga4 screens

Verdict

The call

The clearest difference is review sentiment: Frontier X at 82% against Elonga's 44%. Frontier X also leads on ratings volume (318 vs 22). Elonga's advantage is in-app purchases (none vs 2) and rating (4.8 vs 4.6). On price, update cadence, ads and device support 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. Elonga asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Elonga holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Frontier X has 318 ratings behind it against 22, so its average is the more settled of the two. Written reviews complicate that: 82% of Frontier X's written reviews are positive against 44% of Elonga's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Frontier X ships an update every 3 weeks, Elonga every 2 weeks. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

Scorecard5 real differences · 5 level
Frontier X versus Elonga: the parameters behind the verdict, then further details
ParameterFrontier XElonga
PriceFreeFree
Rating4.6 (318 ratings)4.8 (22 ratings) — better
Positive reviews81.8% of reviews — better43.9% of reviews
Number of ratings318 — better22
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size569 MB339 MB
Age rating4+17+
DeveloperFourthfrontiermySASY a.s.

Customer experience

Frontier X

All ratings318 ratings
Positive90.9%
Neutral1.3%
Negative7.9%
Written reviews137 reviews
Positive81.8%
Neutral1.5%
Negative16.8%

Elonga

All ratings22 ratings
Positive95.5%
Neutral4.5%
Negative0.0%
Written reviews66 reviews
Positive43.9%
Neutral22.7%
Negative33.3%

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

Elonga

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
None

Elonga

No in-app purchases

Questions

Is Frontier X free?
Frontier X is free to download, with in-app purchases available.
Is Elonga free?
Elonga is free to download, with no in-app purchases.
Which has better reviews, Frontier X or Elonga?
Elonga is rated higher. Frontier X averages 4.6 out of 5 from 318 ratings, while Elonga averages 4.8 from 22 ratings.
Do Frontier X or Elonga have ads?
Neither Frontier X nor Elonga shows ads.
Which is updated more often, Frontier X or Elonga?
Frontier X ships an update every 3 weeks, and Elonga every 2 weeks. Most recently, Frontier X was updated on October 16, 2026 and Elonga on October 18, 2026.

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