These are simple Android APKs. They require technical knowledge and run on computers with powerful GPUs for realistic recovery times.
If you lost your own Bitcoin, focus on legitimate recovery methods running on secure PCs, not Android devices. And if you were hoping to access someone else's funds, understand that the cryptography securing Bitcoin is the same protecting banks, militaries, and governments—it cannot be broken by a free download from a shady website. download bitcoin private key finder apk better
Any app claiming to "find" a private key from a public address is either lying or fundamentally misunderstanding cryptography. These are simple Android APKs