Comparison

NM HRV vs BioSignals Personal trainer

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

Head to head
About

NM HRV

Features
Read full description

This application allows you to connect with and use Frontier X - a revolutionary new wearable device that monitors your lungs and heart. Once you download this application on your iPhone, this will allow you to view your real-time data if you exercise with the Frontier X device. In order to use this application, you need to have the Frontier X device, available at fourthfrontier.com. Frontier X integrates with HealthKit to export your Frontier X activities into the Health app and to read heart rate and biometric data. The Frontier X is a chest-worn device that has the following features: Suitable for recording during Rest, Sleep and Activity. Real-time vibration alerts when you cross your Heart Rate thresholds Easy to use. Strap on and start. Sync later View quick activity summary on device screen Highly accurate Heart Rate data Apps available for iOS. IP67 Waterproof up to 1.5 M Battery: 14+ days of typical use, up to 24-hrs continuous use

About

BioSignals Personal trainer

Features
Read full description

AI-HRV: Revolutionizing Biofeedback Training for Stress and Well-being The AI-HRV (Artificial Intelligence Heart Rate Variability) device is an innovative tool that uses biofeedback to help users manage stress, enhance relaxation, and improve overall mental and life quality. By measuring heart rate variability (HRV), the device offers real-time insights into your body's response to stress and relaxation, allowing you to take control of your well-being. What is HRV? HRV measures the time variation between heartbeats and is a key indicator of how your autonomic nervous system (ANS) is functioning. Higher HRV is associated with better emotional resilience, reduced stress, and improved relax, while lower HRV can indicate stress. AI-HRV's Unique Advantage With AI-powered algorithms, the AI-HRV device tracks your HRV in real time, giving you accurate feedback on your stress and relaxation levels. This allows you to: Monitor Stress: Detect when stress is rising, enabling you to respond with relaxation techniques. Enhance Relaxation: Use biofeedback to see how relaxation practices like deep breathing or meditation affect your HRV and reach deeper states of calm. Boost Cognitive Performance: Train your brain for better focus and emotional control, using insights from your HRV to improve mental sharpness under pressure. Biofeedback and AI-HRV: A Powerful Synergy Biofeedback provides real-time information about your mental state, allowing you to learn how to consciously regulate your system, breathing, and other emotional functions. AI-HRV enhances traditional biofeedback by using AI to analyze your data and provide personalized insights. With AI-HRV, you get: Tailored Stress Management: Sessions are customized based on your specific HRV patterns, ensuring you focus on the areas that need the most improvement. Targeted Relaxation Techniques: The device recommends relaxation strategies suited to your unique profile. Improved Emotional Control: Biofeedback helps you regulate emotions like anger, and frustration by becoming more aware of your bodyโ€™s responses. Who Can Benefit from AI-HRV? AI-HRV biofeedback is beneficial for: Professionals in High-Stress Jobs: Manage stress more effectively to stay sharp in demanding situations. Athletes: Optimize recovery and performance by tracking HRV changes after workouts. Individuals with stress: Use non-invasive biofeedback techniques to calm the nervous system. Students: Improve focus and reduce stress during high-pressure situations like exams. Anyone Seeking Well-Being: Achieve better emotional resilience, relaxation, and self-awareness. Why AI-HRV Stands Out AI-HRV goes beyond traditional biofeedback devices by offering: AI-Driven Insights: Detailed analysis of your HRV trends to help you understand your patterns over time. Ease of Use: A user-friendly interface designed for beginners and advanced users alike. Portability: A sleek, portable design that allows you to monitor your HRV anywhere, anytime. Comprehensive Approach: AI-HRV not only tracks stress but also offers insights into relaxation and emotional regulation, giving you a complete picture of your mental and Well-Being. Take Control of Your Well-Being. AI-HRV is the next step in biofeedback technology, combining real-time HRV tracking with AI-driven analysis to offer a personalized approach to stress management and relaxation. Whether you're looking to improve mental performance, reduce stress, or enhance your emotional well-being, AI-HRV provides the tools you need to take control of your Well-Being. Start your journey with AI-HRV today and experience the benefits of advanced biofeedback training for a better Well-Being, more balanced life.

Screenshots

NM HRV4 screens
BioSignals Personal trainer4 screens

Verdict

The call

The clearest difference is update cadence: NM HRV at fortnightly against BioSignals Personal trainer's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NM HRV ships an update fortnightly, BioSignals Personal trainer every 5 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

Scorecard1 real difference ยท 5 level
NM HRV versus BioSignals Personal trainer: the parameters behind the verdict, then further details
ParameterNM HRVBioSignals Personal trainer
PriceFreeFree
Update frequencyFortnightly โ€” betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.514.0 โ€” better
Further details โ€” not scored
Size85 MB28 MB
Age rating12+4+
DeveloperFourthfrontierBioSignals LIMITED

In-app purchases

None

NM HRV

No in-app purchases

None

BioSignals Personal trainer

No in-app purchases

Questions

Is NM HRV free?
NM HRV is free to download, with no in-app purchases.
Is BioSignals Personal trainer free?
BioSignals Personal trainer is free to download, with no in-app purchases.
Do NM HRV or BioSignals Personal trainer have ads?
Neither NM HRV nor BioSignals Personal trainer shows ads.
Which is updated more often, NM HRV or BioSignals Personal trainer?
NM HRV ships an update fortnightly, and BioSignals Personal trainer every 5 months. Most recently, NM HRV was updated on October 3, 2026 and BioSignals Personal trainer on October 1, 2026.

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