Do EMF phone cases actually work?
What a shielding case must accomplish without forcing the phone to transmit harder.
Read the guide →
Independent Product Testing
We test EMF products.
We test EMF products.
The numbers decide what works.
We buy products at retail, measure the same source with and without them, and publish the before-and-after numbers — including the failures and products that make readings worse. No sponsored verdicts.
Sample paired setup
Not a published result
Router guard
SourceWi-Fi router
Distance3 ft
ModeRF
MethodBaseline, then product
Retail purchasedNo free review units
Paired testingSame source and distance
Failures publishedNo result is buried
No sponsored verdictsThe numbers decide
Loading the latest published test results…
Latest test results
The newest product verdicts.
Before-and-after measurements from products we purchased and tested independently.
| Product | Claim on the box | Verdict | Measured change | Price |
|---|---|---|---|---|
| SYB Phone Pouch SYB (Shield Your Body) · full report → | “Powerful radiation blocker for cell phone; durable anti-radiation case / pouch. Fits phones up to 4.33 in wide.” | ❌ No effect | 0.7% | $26 |
| WaveBlock phone sticker WaveBlock · full report → | “The only patented, scientifically backed, lab-tested 5G-shield EMF reduction sticker. USA made.” | ⚠️ Backfires | +4% | $29.95 |
| Large WiFi Router Cover Router Guard · full report → | “Blocks 90% of router EMF and 5G; Wi-Fi still usable.” | 🟡 Partial | 32.1% | $49.59 |
Learn before you buy
Practical EMF guides without the fear.
Understand what measurements mean, which claims are physically possible, and which simple changes may beat an expensive product.
What works, what backfires, and what is a scam?
A measurement-based look at shielding products, stickers, pendants, and common claims.
Read the guide →How far should a router be from your desk?
Why a few extra feet can matter more than many products marketed as protection.
Read the guide →
Our testing method
Change one thing. Measure twice.
The source, meters, distance and operating mode stay fixed. The product is the only variable.
1. Take the baseline
Measure the source with the product removed using the documented setup.
2. Add the product
Install it as directed and repeat the same measurement without changing the setup.
3. Publish the verdict
Show each meter’s pair, the average change, and the verdict — even when it fails.
Help choose the next test
Suggest a Product
Seen a product that claims to block EMF?
Send us the product name, its claim and where it is sold. We buy selected products at retail and publish the result either way.