Side-by-Side Comparison
| Feature | SonoHealth HeartBeats™ | Sonoline C |
|---|---|---|
| FDA Status | FDA-cleared ✅ | Not FDA-cleared ❌ |
| Probe Frequency | 2.5 MHz | 3 MHz |
| Digital BPM Display | ✅ Yes | ✅ Yes |
| Audio Speaker | ✅ Built-in | ✅ Built-in |
| Headphone Jack | ✅ Yes | ✅ Yes |
| Power | 9V battery | AA batteries |
| Warranty | 2 years | Varies by seller |
| Return Policy | 60-day guarantee | Varies by seller |
| Brand | US-based (SonoHealth) | Generic / various sellers |
| Price | $79 | ~$30–50 |
| Where to Buy | sonohealth.com, Amazon | Amazon, various |
The Key Difference: FDA Clearance
The most significant difference is FDA clearance. The SonoHealth HeartBeats™ has been reviewed and cleared by the FDA as a Class II medical device. The Sonoline C has not undergone FDA review and is not FDA-cleared for sale as a medical device in the United States. This matters for several reasons:- FDA clearance means the device has been evaluated for safety and substantial equivalence
- Non-cleared devices may have inconsistent ultrasound output levels
- FDA-cleared labeling includes appropriate safety warnings that protect users
- Many healthcare providers specifically recommend FDA-cleared devices
Probe Frequency: 2.5 MHz vs 3 MHz
The Sonoline C uses a 3 MHz probe. The HeartBeats™ uses 2.5 MHz. Both are in the appropriate range for home fetal heart detection, with the following practical differences:- 2.5 MHz has slightly deeper tissue penetration, which can be beneficial for users with higher BMI
- 3 MHz has slightly higher resolution at shallow depths, which may benefit very lean users in early pregnancy
- In practice, both frequencies work well for the majority of users in the second trimester onward
Price Difference
The Sonoline C is less expensive (79 for the HeartBeats™). The HeartBeats™ commands a higher price due to FDA clearance, a 2-year warranty, 60-day return policy, and US-based brand support. For some parents, the lower price of the Sonoline C is the deciding factor. For others, the peace of mind from an FDA-cleared device with a real warranty is worth the premium.Who Each Is Best For
SonoHealth HeartBeats™ is best for:- Parents who want FDA-cleared reassurance
- Anyone who values a warranty and return policy
- Users who want US-based customer support
- Those with higher BMI (2.5 MHz penetrates deeper)
- Parents primarily motivated by price
- Those who already own one and are comfortable with it
- International buyers where FDA status is less relevant
The Bottom Line
If FDA clearance, warranty coverage, and brand accountability matter to you, the SonoHealth HeartBeats™ is the better choice. If budget is the primary concern and you understand the trade-offs, the Sonoline C is a widely used option.Shop HeartBeats™ Fetal Doppler
FDA-Cleared · 2.5 MHz · 2-Year Warranty · $79