If you’re building a digital health product, integrating data from wearables and medical devices is no longer optional—it’s essential. From syncing heart rate data from a Fitbit to pulling blood pressure readings from connected monitors, having the right API can save you time, money, and headaches. In this article, we’ll compare the three most sought-after APIs on the market today: Terra, Validic, and Vitalera.
1. Terra: Built for Fitness Integrations
Terra API is widely used among fitness-focused apps. It allows developers to integrate data from popular wearables such as Fitbit, Garmin, Apple Watch, and others. It’s especially popular among startups targeting wellness and performance.
Key strengths:
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- Integrates with major fitness wearables.
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- Offers access to activity, sleep, and heart rate data.
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- Developer-friendly documentation.
Limitation: While great for fitness, Terra falls short when more structured clinical data is needed for healthcare or research use cases.
2. Validic: Focused on Clinical and Hospital-Grade Data
Validic API is often the go-to choice for US hospitals and insurance companies. It focuses on secure, compliant access to personal health data from both wearables and medical devices.
Key strengths:
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- HIPAA-compliant and enterprise-ready.
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- Strong support for clinical workflows and device integrations.
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- Ideal for B2B corporates.
Limitation: Integration often requires more technical effort and longer implementation timelines.
3. Vitalera: The Only API That Generates Code Automatically
Vitalera API is a new-generation platform that automatically generates the code needed to connect devices, drastically reducing development time and developers. Unlike other solutions, Vitalera isn’t limited to wearables—it also integrates deeply with medical devices used in clinics and at home.
Why Vitalera stands out:
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- Auto-generated code dramatically lowers the barrier for developers.
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- Works with wearables (like Fitbit, Google Fit) and certified medical devices.
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- Consumes more data types per patient than any other API, including biometric, behavioral, and contextual health data.
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- Built for scalable, AI-powered health applications.
Quick Comparison Table
| API | Fitbit, Google, Apple…API | SDK | Auto Code Generation | Data Coverage | Primary Use Case |
|---|---|---|---|---|---|
| Terra | ✅ | ❌ | ❌ | Moderate | Fitness & Wellness |
| Validic | ✅ | ✅ | ❌ | High | Clinical Systems |
| Vitalera | ✅ | ✅ | ✅ | Very High | Developers, Digital Health Products, Clinics & Insurances |
If you’re searching for a reliable API for wearables, these three options are your best bet in 2025. Terra is ideal for fitness apps, Validic is strong in clinical settings, but Vitalera is the most advanced solution overall. It not only connects to more devices and pulls more data, but also generates the integration code automatically, saving you time and resources.