Supported Features
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VoiceOver
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Larger Text
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Dark Interface
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Differentiate Without Color Alone
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Sufficient Contrast
Blood Oxygen Monitor - OxyByte
SpO2 Pulse Oximeter O2 App
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Breathe free & easy with OxyByte - Your Personal Respiratory Intelligence Companion.
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
Ratings & Reviews
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.
The developer, Evolve Medical Systems, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Location
- Contact Info
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Evolve Medical Systems, LLC
- Size
- 25.3 MB
- Category
- Medical
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Italian, Japanese, Portuguese, Spanish
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Contains
Advertising
Messaging and Chat
Health or Wellness Topics
- In-App Purchases
Yes
- SmartBP Premium Annual $29.99
- Premium Weekly $5.99
- Premium Ad-free Lifetime $59.99
- Premium Monthly $5.99
- Copyright
- ©Evolve Medical Systems LLC, All Rights Reserved.
