ShutterguardFAQ and contact
Using the app
How do I read the score?
The score adds up the clues found, out of 90: lens reflection 45, Bluetooth 20, infrared 10, Wi‑Fi 10, ultrasonic noise 5. The magnetic field is shown for reference and not scored. The free version uses lens reflection and infrared, for a maximum of 55.
A high score means more clues, not proof of a hidden camera. A low score does not mean the room is safe.
I found a suspicious reflection. What now?
First look at the spot yourself. Metal handles, glass, mirrors and water droplets are common causes. You can also move closer or scan again from another angle.
If you are still concerned, contact local police, report it to your booking platform, or tell the venue staff. Taking a photo of the scene first is a good idea.
Why do I keep seeing reflections where there is nothing?
Metal, glass, mirrors and water all reflect light and can look like a lens. The result screen lists likely causes for each spot. Check them with your own eyes.
How do I get better results?
Close the curtains or turn off the lights, stay about 30 to 50 cm from the object, move slowly, and scan from a few different angles.
What can't it detect?
Cameras that are off, covered, set deep in a pinhole, coated against reflection, too far away, or at a steep angle give little or no reflection. See What it cannot do.
Is the app available in English?
The app interface is currently in Traditional Chinese only.
Purchases
What is the difference between Pro and Pro+? Do I need both?
Pro adds the sweep-mode lens check plus Bluetooth, ultrasonic noise and Wi‑Fi checks. Pro+ includes everything in Pro and adds a 3D room map. It is only sold on iPhone models with LiDAR. Pro+ includes Pro, so you only need one.
How do I restore a purchase on a new phone?
Sign in with the same Apple Account, open Settings in the app and tap Restore Purchases (in version 1.0 it is at the bottom of the upgrade page). Scan history stays on the original phone and is not synced by the app.
Can I get a refund?
Purchases are handled by Apple. Request a refund at reportaproblem.apple.com. Apple decides whether it is approved.
Is there a subscription?
No. Pro and Pro+ are one-time purchases.
Devices and data
Which devices are supported?
An iPhone with iOS 17 or later. The 3D room map needs an iPhone with LiDAR. There is no iPad or Android version.
Is my data uploaded?
No. All detection runs on the phone, and scan history and photos stay there. See the privacy policy.
How do I delete everything?
In the app's Settings, delete all records, or simply delete the app.
Contact
Bug reports, suggestions and press: yanru.studio@icloud.com. Please include your iPhone model and iOS version.