ReViiV vs HeartMath
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReViiV
This app offers customized daily breathing exercises designed to alleviate post-viral symptoms like fatigue, brain fog, and loss of taste/smell. It utilizes scientifically backed techniques across 16 progressive stages to promote steady improvement and symptom relief.
- Customized daily breathing exercises
- 16 progressive stages for improvement
- Relief from fatigue, brain fog, taste/smell loss
- 8 scientifically backed techniques
- Weekly progress assessments and graphs
- Detailed guides and technique resources
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** Rapid Long-Haul Relief ** Experience fast relief from your Long-Haul / Post-Viral symptoms with ReViiV, a breakthrough app offering customized daily exercises designed to treat common Long-Haul symptoms. Imagine less fatigue, clearer thinking, and the return of taste/smell, often starting within 24 hours – all possible through our custom breathing program. Featuring 8 scientifically backed techniques fused into simple, daily exercises, this is more than deep breaths; it's about continuous improvement and reclaiming your health. (View the Full Medical Paper: https://tinyurl.com/mukdb2cc) ** Steady Improvement over 16 Stages ** ReViiV is designed to quickly relieve many common Long-Haul (PASC) symptoms, including Fatigue, Taste/Smell loss, Breathlessness, “Brain Fog’, Muscle/Joint pain, Insomnia, and more. ReViiV uses 5-minute daily breathing exercises, progressively tailored to your needs, to both relieve symptoms and facilitate steady, incremental improvement over 16 stages. Weekly assessments and graphs show your progress along with visual aids, detailed guides, and resources to ensure proper technique. ** Featuring 8 Scientifically Backed Techniques ** Drawing from the latest Long-Haul (PASC) research, as well as respiratory and cognitive-behavioral therapy, ReViiV's effectiveness stems from 8 scientifically backed techniques fused into a highly effective breathing program: 1. Nasal Breathing: ReViiV promotes nasal breathing 24/7 to increase the efficiency of your lungs, improve oxygen intake, reduce fatigue, and help restore taste & smell. 2. Prolonged Exhalation: By emphasizing long exhales, ReViiV aims to reduce breathlessness, relax your body, improve your sleep, and improve lung function. 3. Diaphragm Activation: ReViiV encourages deep 'belly breathing' to improve your lung function, reduce fatigue and shortness of breath. By stimulating the nervous system, it also reduces stress and anxiety, enhancing well-being. 4. Oxygen/CO2 Regulation: ReViiV aims to improve your lung capacity and balance the levels of oxygen and CO2 in your body by fostering the Bohr Effect, helping to alleviate symptoms like fatigue, breathlessness, and ‘brain fog’. 5. Regulated Immune System: ReViiV's breathing exercises are designed to keep your immune system in check, reducing inflammation and other immune-related symptoms often seen in Long-Haulers. 6. Olfactory Re-training: ReViiV incorporates specific exercises that can enhance your sensitivity to smell and taste, especially useful for Long-Haulers. 7. Breath-Holding: When you're ready, ReViiV introduces daily breath-holding exercises to help your body adapt to higher CO2 levels, improving overall body efficiency. 8. Stress Reduction and Mindfulness: ReViiV includes mindfulness techniques to help reduce fatigue, improve sleep, and combat stress, anxiety, and depression. ** Key Features & Functionality ** • Safe, 100% natural Long-Haul breathing therapy, requiring just minutes a day. • Harness 8 potent techniques for rapid Long-Haul symptom relief and ongoing improvement. • Benefits often noticeable within 24 hours. • Weekly assessments and graphs to measure and track your progress. • Progressive 16-stage guided program with three intensity levels. • Auto-adjusts exercise intensity based on your progress. • Co-created by a Long-Hauler along with leading post-viral research and trials. • Multiple breath counters and countdown timers within a user-friendly interface. • Access to additional Long-Haul resources, guides and tips to ensure you're on the right track. • Daily exercises tailored for morning focus, afternoon energy, and evening relaxation. Download ReViiV FREE Now! ** For More Information ** - How ReViiV Works: https://reviiv.me/howitworks - Full Medical Paper: https://tinyurl.com/mukdb2cc Terms of use: https://www.Apple.com/legal/internet-services/itunes/dev/stdeula/
HeartMath
This app helps you manage stress, improve focus, and achieve optimal performance by aligning your heart, mind, and emotions. It offers guided sessions, immersive journeys, and coherence practices based on over 30 years of research.
- Real-time HRV Coherence Measurement
- Coherence Training
- Scientifically Validated Techniques
- Guided Learning Sessions
- Progress Tracking
- Heart-Brain Coherence Benefits
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Align your heart, mind, and emotions to help you manage stress, improve focus, and perform at your best. Enjoy HeartMath’s free intro experience to access your heart’s natural intelligence and see your heart-brain coherence as real-time feedback. Then start your 7-day free trial to explore a comprehensive collection of guided sessions, immersive journeys, and coherence practices designed to help you experience greater calm, focus, clearer thinking, and a more balanced you. **Inner Balance Coherence Plus sensor owners: Use your sensor to unlock a lifetime subscription.** Built on 30+ years of research on the heart-brain connection and supported by over 500 research studies, HeartMath is used in wellness and resilience programs at organizations including Stanford Healthcare and Kaiser Permanente, as well as in professional sports, the military, law enforcement, leading universities, non-profit organizations, and major corporations. It is used by coaches, trainers, and health professionals for stress education and resilience training. The HeartMath system is more than stress management: it’s a journey to more heart-centered living. This app puts HeartMath’s practical, research-supported tools right at your fingertips. Make mental and emotional well-being an achievable part of your daily life. The HeartMath technology is for stress education and resilience training. It is not a medical device. We encourage you to consult a health professional before making any medical decisions. KEY FEATURES • Real-time HRV coherence feedback: Use your phone’s camera or upgrade to the Inner Balance Coherence Plus sensor for a more precise signal and a free app subscription. • Coherence training: Whether you choose the game or the guided mode, watch your heart-rhythm pattern and coherence change in real time. • Research-Supported: Techniques developed from 30+ years of scientific research to help boost focus, positive feelings, and your ability to manage stress. • Guided learning: Explore guided meditations, courses, and videos led by HeartMath trainers. • Progress tracking: View your progress over time with a variety of chart options. WHAT REGULAR COHERENCE PRACTICE CAN SUPPORT Heart-brain coherence is a balanced, focused state you create yourself through calm breathing and positive focus. Coherence supports the body’s natural ability to shift from tension to calm, helping you manage everyday stress and build inner balance. • SUPPORTS STRESS MANAGEMENT & EMOTIONAL BALANCE • SUPPORTS FOCUS AND MENTAL CLARITY — coherent states are associated with more focus, clarity, and creativity. • SUPPORTS RESILIENCE — regular practice can help you adapt to and recover from challenging situations more quickly. • ENHANCES EMOTIONAL WELL-BEING AND SELF-AWARENESS — practice can support a greater sense of inner calm and a more mindful relationship with your emotions. Subscription terms: • Subscriptions renew automatically at the end of each year. • You can cancel your subscription at any time in your account settings. • You will not be refunded for any unused portion of a subscription. • Price is subject to change. • Subscriptions are not available in all countries. • Full subscription terms: https://my.heartmath.com/terms If you’d like to purchase an Inner Balance Coherence Plus sensor to unlock complimentary lifetime access to the HeartMath app, please visit the HeartMath website.
Screenshots
Verdict
The clearest difference is rating: HeartMath at 4.9 against ReViiV's 4.5. HeartMath also leads on ratings volume (4.7K vs 8). ReViiV's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 26.0). On price, review sentiment, update cadence and ads 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
Both are free to download. ReViiV sells 2 in-app purchases, starting at $0.99 per month and HeartMath sells 4 in-app purchases, starting at $39.00 per year. Whichever you choose, the download price is not the number that matters.
HeartMath holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: HeartMath has 4.7K ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 75% of ReViiV's written reviews are positive against 74% of HeartMath's, so the app with the better star average is not the one people write more warmly about.
ReViiV ships an update monthly, HeartMath every 3 weeks. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.
| Parameter | ReViiV | HeartMath |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (8 ratings) | 4.9 (4.7K ratings) — better |
| Positive reviews | 75.0% of reviews — better | 73.8% of reviews |
| Number of ratings | 8 | 4.7K — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 25 MB | 185 MB |
| Age rating | 12+ | 4+ |
| Developer | Martysoft LLC | HeartMath Inc. |
Customer experience
ReViiV
HeartMath
Bugs and requests
ReViiV
Not enough reviews yet to summarise bugs or requests.
HeartMath
Reported bugs
4 issues- Sensor connection issues on newer devices
- App crashes and freezes on iPhone 16 Pro
- Inaccurate heart rate and coherence readings
- Screen sleep behavior disrupting sessions
Requested features
5 requests- Add dark mode option
- Allow playing music/sounds during sessions
- Provide audio feedback on coherence levels
- Add session history customization and details
- Improve sensor compatibility with older devices
In-app purchases
ReViiV
- Long Haul Breathing Therapy3 Days trial$0.991 Month
- Long Haul Breathing Therapy3 Days trial$6.991 Year
HeartMath
- HeartMath Premium7 Days trial$39.001 Year
- HeartMath Premium7 Days trial$59.001 Year
- HeartMath Premium7 Days trial2 variants$79.001 Year
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- HeartMath Premium7 Days trial$99.991 Year









