Smartwatches have evolved rapidly over the past few years, offering premium health-tracking features at increasingly affordable prices. One of the most sought-after features is blood oxygen monitoring (SpO₂), which helps users track breathing, sleep quality, fitness levels, and overall wellness. Thankfully, you no longer have to spend hundreds to get a reliable smartwatch with SpO₂ tracking. In 2025, several budget-friendly smartwatches offer excellent accuracy, strong battery life, and impressive smart features—all without breaking the bank.
In this guide, we highlight the best budget smartwatches with blood oxygen monitoring in 2025, comparing features, performance, accuracy, and price to help you choose the perfect one for your needs.
Why Choose a Smartwatch with Blood Oxygen Monitoring?
Blood oxygen (SpO₂) monitors measure how much oxygen your red blood cells carry. A smartwatch with this feature can help you:
- Track sleep quality and detect low oxygen levels
- Monitor fitness performance during workouts
- Spot potential breathing or altitude issues
- Gain deeper health insights
- Improve wellness awareness
While smartwatches cannot diagnose medical conditions, they offer helpful real-time data.
Best Budget Smartwatch with Blood Oxygen 2025 – Top Picks
Below are the top-performing and most affordable SpO₂-enabled smartwatches of the year.
- Amazfit Bip 5 — Best Overall Budget Smartwatch with SpO₂
Key Features:
- Large 1.91-inch display
- Built-in SpO₂ sensor
- Up to 10–15 days battery life
- GPS tracking
- Zepp OS with smooth performance
- Lightweight, comfortable design
The Amazfit Bip 5 stands out as the best bang-for-your-buck smartwatch of 2025. It offers reliable blood oxygen monitoring, multiple health sensors, and excellent battery life—all at a highly affordable price.
Why It’s the Best
- Highly accurate SpO₂ readings
- Great display for outdoors
- Strong ecosystem through Zepp app
- Exceptional value
- Redmi Watch 4 — Best Budget Smartwatch for Fitness & SpO₂
Key Features:
- 1.97-inch AMOLED display
- All-day SpO₂ monitoring
- Over 150 sports modes
- 20-day battery life
- Lightweight aluminum frame
The Redmi Watch 4 is one of the most polished budget smartwatches available. Its large AMOLED screen and long battery life make it an ideal daily companion.
Best For:
- Fitness tracking
- Beautiful display lovers
- Long battery life users
- Huawei Band 9 — Best Smart Band with Blood Oxygen
Key Features:
- Lightweight, slim design
- TruSeen 5.5 SpO₂ & heart-rate monitoring
- Up to 14 days battery life
- Sleep tracking with high accuracy
If you prefer a slimmer device, the Huawei Band 9 offers advanced health tracking at a super low price. It’s comfortable for sleep tracking and provides highly accurate SpO₂ data.
Why It Stands Out
- Most accurate sleep + SpO₂ tracking in its class
- Extremely lightweight for 24/7 wear
- Amazfit Band 7 — Best Battery Life & SpO₂ Combo
Key Features:
- 18-day typical battery
- 24-hour SpO₂ monitoring
- AI-powered health analysis
- Compact yet vibrant screen
The Amazfit Band 7 is perfect for users who want long battery life without sacrificing features. Its SpO₂ readings are quick and reliable.
Best For:
- Long-term wear
- Budget fitness enthusiasts
- Fitbit Inspire 3 — Best UI & App Experience
Key Features:
- Accurate SpO₂ tracking (requires Fitbit Premium for advanced insights)
- Sleek design
- Excellent app ecosystem
- Reliable sleep tracking
While slightly pricier, the Fitbit Inspire 3 offers one of the best app experiences in the budget category. Fitbit’s sleep and health algorithms are industry-leading.
Why You’ll Love It
- Clean interface
- Detailed health insights
- Strong ecosystem
Comparison Table — Best Budget Smartwatches with Blood Oxygen 2025
| Model | Display | SpO₂ Monitoring | Battery Life | Best For |
| Amazfit Bip 5 | 1.91″ LCD | Yes | 10–15 days | Overall value |
| Redmi Watch 4 | 1.97″ AMOLED | All-day SpO₂ | 20 days | Display & fitness |
| Huawei Band 9 | Smart band | Yes | 14 days | Sleep & comfort |
| Amazfit Band 7 | Smart band | Yes | 18 days | Battery life |
| Fitbit Inspire 3 | Smart band | Yes | 8–10 days | App ecosystem |
How to Choose the Best Budget Smartwatch with SpO₂
- Health Tracking Accuracy
Look for devices with reliable sensors and reputable brands (Amazfit, Huawei, Fitbit).
- Battery Life
Budget devices often have excellent battery:
- Smartwatches: 7–20 days
- Smart bands: 10–18 days
Choose based on your usage.
- Display Quality
A larger or AMOLED display helps with outdoor visibility.
- Comfort & Weight
Wrist comfort matters for sleep tracking and all-day wear.
- App Compatibility
Check:
- iOS compatibility
- Android compatibility
- Insight quality in companion apps
- Price-to-Performance Ratio
A good budget smartwatch should cost under $100 while offering reliable health tracking, notifications, and long battery life.
Tips for Getting Accurate Blood Oxygen Readings
- Keep your wrist steady during measurement
- Ensure the watch fits snugly
- Avoid cold environments
- Clean the sensor regularly
- Measure at rest for best results
Final Thoughts
Finding a budget-friendly smartwatch with reliable blood oxygen monitoring in 2025 is easier than ever. Whether you prefer the full smartwatch experience of the Amazfit Bip 5, the vibrant AMOLED display of the Redmi Watch 4, or the lightweight comfort of the Huawei Band 9, there’s a perfect SpO₂-enabled wearable for every budget.
These devices deliver impressive health insights, strong battery life, and smooth performance—proving you don’t need to spend premium prices for high-quality health tracking.
Choose the smartwatch that fits your lifestyle, and enjoy advanced wellness features without stretching your budget!
