# Blood Oxygen Monitor - OxyByte — SpO2 Pulse Oximeter O2 Level > Respiratory health tracker for blood oxygen, breathing, and symptoms. (iPhone/iPad app by Evolve Medical Systems, LLC.) - Source: https://appshunter.io/ios/app/blood-oxygen-monitor-oxybyte/id6759225586 (this page in markdown: same URL + `.md`) - Developer: [Evolve Medical Systems, LLC](https://appshunter.io/developer/519076561) - Category: Medical, Health & Fitness - Price: Free with in-app purchases - Rating: 3.90/5 from 7 App Store ratings - Age rating: 17+ - Requires: iOS 18.0 · 27 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, European Spanish - Released: 2026-03-14 - Data updated: 2026-08-23 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/blood-oxygen-monitor-oxybyte/id6759225586/reviews.md ## What is Blood Oxygen Monitor? Blood Oxygen Monitor - OxyByte Track your blood oxygen (SpO₂), respiratory rate, peak flow, symptoms, CPAP usage, and environmental air quality - all in one beautifully simple respiratory health app. OxyByte helps you understand patterns in your breathing so you can feel informed and confident, not overwhelmed. Sync Seamlessly with Apple Health OxyByte integrates with Apple Health to import: • Blood oxygen (SpO₂) • Respiratory rate • Heart rate • Sleep data • Apple Watch readings Automatically keep your data updated from your wearables. Complete Timeline History View a structured timeline of: • Oxygen readings • Respiratory rate • Peak flow (PEF) • CPAP usage • Inhaler & medication logs • Symptom episodes See everything in one place — organized by date and time. Personalized Respiratory Stability Score OxyByte compares your recent data to your historical baseline to help you understand whether your patterns are stable or changing. Designed to highlight trends — not create unnecessary alarm. Flare-Up Trend Monitoring Track subtle shifts in: • Oxygen levels • Respiratory rate • Symptom severity • Inhaler usage • Sputum changes Early pattern awareness helps you stay proactive. Sleep Oxygen & CPAP Insights • Overnight oxygen distribution • Percent of night below 90% • Lowest oxygen recorded • CPAP adherence tracking Understand what happens while you sleep. Symptom Tracking Log: • Shortness of breath • Wheezing • Cough • Sputum amount & color • Chest tightness • Fatigue • Fever Overlay symptoms on charts to reveal meaningful connections. Outdoor Respiratory Risk Integrated Air Quality Index (AQI) data helps you understand environmental impact on your breathing. Flexible Chart Views View trends across: • 1 Day • 1 Week • 1 Month • 3 Months • 1 Year • All Time Overlay symptoms and compare metrics for deeper insight. Designed For • Asthma • COPD • Sleep apnea • Oxygen therapy users • Post-viral lung monitoring • Caregivers • Anyone tracking blood oxygen OxyByte is designed to present respiratory health information clearly and calmly — without overwhelming alerts or medical complexity. Important OxyByte is not a medical device and does not provide medical diagnosis. Always consult a qualified healthcare professional regarding medical decisions. Read full disclaimer here: https://www.oxybyte.app/disclaimer ## Key features - Blood oxygen (SpO₂) tracking - Respiratory rate monitoring - Symptom logging - Apple Health integration - CPAP usage tracking - Air quality insights - Personalized stability score ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | SmartBP Premium Annual | $29.99 | per year | | Premium Monthly | $5.99 | per month | | Premium Weekly | $5.99 | per 7 days | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Premium Ad-free Lifetime | $59.99 | one-time | ## Frequently asked questions about Blood Oxygen Monitor ### What respiratory metrics does OxyByte track? OxyByte tracks blood oxygen (SpO₂), respiratory rate, peak flow, and symptoms. It also monitors CPAP usage and integrates environmental air quality data. ### How does OxyByte sync with other health data? OxyByte seamlessly syncs with Apple Health to import blood oxygen, respiratory rate, heart rate, sleep data, and Apple Watch readings, keeping your data automatically updated. ### Can OxyByte help monitor sleep and CPAP use? Yes, OxyByte provides insights into overnight oxygen distribution, percentage of night below 90%, lowest recorded oxygen, and CPAP adherence tracking. ### Does OxyByte provide a medical diagnosis? No, OxyByte is not a medical device and does not provide medical diagnosis. It is designed to present respiratory health information clearly and calmly. Always consult a qualified healthcare professional for medical decisions. ### What conditions is OxyByte designed for? OxyByte is designed for individuals with asthma, COPD, sleep apnea, oxygen therapy users, those monitoring post-viral lung health, caregivers, and anyone tracking blood oxygen levels. ### How often is OxyByte updated? The latest version of OxyByte is 1.3, and it was last updated on May 14, 2026. Updates are released to improve functionality and add new features. ### Does OxyByte have ads? Yes, OxyByte contains advertisements. These ads help support the development and maintenance of the app. ### What is the age rating for OxyByte? OxyByte has an age rating of 17+, indicating it is intended for mature users. This is common for health-related applications that may contain complex information. ## Version history (last 5 releases) ### 1.5 — 2026-07-31 Fixed a few issues regarding nighttime saturation calculations, dark mode and watch app. ### 1.4 — 2026-06-11 Exciting news! OxyByte now includes an Apple Watch app. With the new Watch app, you can quickly view snapshots of your blood oxygen (SpO₂), respiration rate, and heart rate right from your wrist. You can also log SpO₂ readings, view your respiration stability score, check sleep oxygen insights, and see outdoor risk information based on air quality index and pollutants. ### 1.3 — 2026-05-14 In our latest release, we’ve added the last synced time for SpO2 data and introduced notifications when new oxygen measurements are available. We’ve also enhanced the UI for a smoother experience, added new history filters, and expanded language support to include French, German, Italian, Spanish, Portuguese, and Japanese. ### 1.2 — 2026-04-03 In our latest release, we’ve introduced VoiceOver accessibility support, and you can now share charts with a simple long press. ### 1.1 — 2026-03-18 Breathe free & easy with OxyByte - Your Personal Respiratory Intelligence Companion. ## More apps by Evolve Medical Systems, LLC - [Blood Pressure Tracker SmartBP](https://appshunter.io/ios/app/blood-pressure-tracker-smartbp/id519076558) - [Diabetes Tracker App Glucobyte](https://appshunter.io/ios/app/diabetes-tracker-app-glucobyte/id1525105497) - [Meal Prep Food Plan Identifier](https://appshunter.io/ios/app/meal-prep-food-plan-identifier/id6745242977) - [Lab Blood Test Result VitalDot](https://appshunter.io/ios/app/lab-blood-test-result-vitaldot/id6746138206) - [Medication Reminder VitalQuest](https://appshunter.io/ios/app/medication-reminder-vitalquest/id6761392460) All apps by Evolve Medical Systems, LLC: https://appshunter.io/developer/519076561 ## Related topics [sp2 systems](https://appshunter.io/ios/topics/sp2-systems) · [blood oxygen monitor](https://appshunter.io/ios/topics/blood-oxygen-monitor) · [blood oxygen monitoring](https://appshunter.io/ios/topics/blood-oxygen-monitoring) · [free oxygen monitor level](https://appshunter.io/ios/topics/free-oxygen-monitor-level) · [sp02 monitor](https://appshunter.io/ios/topics/sp02-monitor) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*