If you just want to , skip the outdated “NetCut Defender APK” and install ARP Guard from F-Droid. It’s free, open-source, and actively maintained for new Android versions.
NetCut Defender is an Android application designed to detect and protect devices on a local Wi‑Fi network from ARP spoofing/ARP poisoning and "NetCut" style attacks that can disconnect or throttle devices by manipulating ARP tables. The app typically scans the LAN for devices, monitors ARP activity, and attempts to block or alert on malicious ARP replies; some versions also provide one‑tap protection to restore normal ARP mappings. netcut defender apk new