iOX vs Rewire
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iOX
This app helps manage your personal health by noninvasively tracking blood oxygenation, heart rate, and perfusion index. It features a plethysmograph display and programmable alarms for health alerts. Data can be easily exported for review.
- Noninvasive SpO2 tracking
- Heart rate monitoring
- Perfusion index tracking
- Plethysmograph display
- Programmable alarms
- One-click CSV data export
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iOX’s new integrated mobile app brings our products to life. It is designed to fit your lifestyle and assist in everyday health management. The iOX allows you to noninvasively track and trend blood oxygenation(SpO2), heart rate(HR), and perfusion index(PI) for sports and aviation use. iOX’s new integrated app empowers you to manage your personal health in an intuitive way, while keeping up with your busy life. This app features a plethysmograph display and programmable alarms to let you know when values are too high or too low. One-click export of the recorded data into a CSV file.
Rewire
Visualize your stress levels in real-time through heart rate biofeedback. This app translates physiological changes into a dynamic color display, helping you understand your body's responses to daily experiences and practice mindfulness.
- Real-time heart rate biofeedback
- Color visualization of stress levels
- Personalized resting heart rate baseline
- Privacy-first design, data stays on device
- Guided mindfulness and calming practices
- Optional integration with Rewire Dome display
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Come home to your body. Make time to recover from everyday stress. Discover what helps you feel calmer through guided body-based practices and personalized heart-rate color feedback. Your stress response is automatic. Recovery can be practiced. After a demanding day, a difficult conversation, or an intense workout, Rewire: Heart + Mind Insight helps you pause, notice how you feel, and choose a practice that supports your recovery. RESET. PRACTICE. RESTORE. Start with a brief reset. Explore a guided practice. Give yourself time to restore. • Breath: Follow breathing rhythms and guided techniques. • Movement: Explore movement and touch-based practices. • Connection: Make space for connection and care. • Awareness: Engage your senses and notice your body. • Nourish: Explore ways to support your everyday wellbeing. Hand-curated sounds, videos, and guides bring these practices together to support nervous-system recovery. Choose how much time you have, follow along, and finish with a personal check-in and encouragement. SEE YOUR ACTIVATION. PRACTICE YOUR RECOVERY. Rewire’s patented Heartbeat tool translates live heart-rate data into seven color levels personalized to your resting baseline. Green represents your baseline. Warm colors indicate heart rate above your baseline. Cool colors—cyan, azure, and deep purple—indicate heart rate below your baseline and can accompany relaxation. Movement, stress, and emotions can all raise heart rate. Use the colors alongside how you feel to notice your patterns and explore what helps you recover. Choose a practice. Observe your response. Practice returning toward your baseline after activation, and make recovery part of your daily routine. The colors are feedback, not a score. YOUR HEARTBEAT. IN A WHOLE NEW LIGHT. Bring your personalized color feedback into the room with the optional Rewire Heart Light. Your heart-rate monitor supplies live heart-rate data. The app translates it into colors relative to your resting baseline. The Heart Light displays those same colors in your surroundings, so you can follow the feedback without continually watching your phone. Let the colors accompany your breathing, movement, or guided recovery practice. The Rewire Heart Light kit includes a compatible heart-rate monitor and is sold separately on Amazon. Visit rewirestress.com for Heart Light details and purchasing information. Already have the kit? This is your companion app. Connect the included monitor and pair your Heart Light to begin. START WITH WHAT YOU HAVE. Use guided practices, breathing tools, sounds, and recovery sessions without any additional hardware. For live color feedback in the Heartbeat tool, connect a compatible Bluetooth heart-rate monitor. The Heart Light is optional. No account or login is required. Come home to your body. Discover what helps you recover. Make time for yourself, every day. Rewire is a general wellness tool, not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease or medical condition.
Screenshots
Verdict
The clearest difference is review sentiment: Rewire at 100% against iOX's 35%. Rewire also leads on rating (5.0 vs 2.8). iOX's advantage is update cadence (every 2 months vs every 7 months) and iOS requirement (12.0 vs 17.6). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Rewire holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 15 and 15 respectively. Written reviews point the same way: 35% of iOX's written reviews are positive against 100% of Rewire's.
iOX ships an update every 2 months, Rewire every 7 months. Both last shipped on October 24, 2026.
| Parameter | iOX | Rewire |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (15 ratings) | 5.0 (15 ratings) — better |
| Positive reviews | 35.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 | 15 |
| Update frequency | Every 2 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 6 MB | 19 MB |
| Age rating | 17+ | 4+ |
| Developer | Safe Heart USA, Inc. | Squid Store, LLC |
Customer experience
iOX
Rewire
In-app purchases
iOX
No in-app purchases
Rewire
No in-app purchases









