A few years ago, a popular forum distributed a file called SpyCamera_Premium_v3.2_cracked.apk . It promised 4K recording with a black screen. Within 48 hours of installation, users reported identical symptoms:

Using a hidden camera app to record individuals without their consent may violate privacy laws like the GDPR in Europe or various consumer protection acts in the US.

The premium version of this application offers a suite of "stealth" and "protection" features that go far beyond basic recording:

These apps allow you to record video while the screen is off or while you are using other applications. Mobile Hidden Camera

: Investigative reporting where open filming might be restricted or dangerous.

Several high-profile lawsuits have emerged where neighbors sued homeowners for pointing doorbell cameras directly into their living room windows. The general legal consensus is that you have no expectation of privacy in a public street, but you have a total expectation of privacy inside your home (with the curtains drawn) or in your fenced backyard.

or using a Bluetooth controller while the screen remains black. Google Play Popular Applications & Platforms Third Eye Hidden Camera Record - Apps on Google Play

Do not download cracked APKs. The risk of installing a RAT (Remote Access Trojan) or turning your phone into a botnet far outweighs the $15 you save. If you cannot afford the legitimate premium app, then you cannot afford the lawsuit or the identity theft that follows the cracked version.