Both Mp4moviez and Filmyzilla are "torrent" or "piracy" websites. They host copyrighted content without permission. Because of this, they are frequently blocked by internet service providers and removed from official app stores.
Poorly coded pirated apps often run heavy background processes that drain your battery and slow down your phone. Better, Safer Alternatives mp4moviez in filmyzilla install
If you decide to browse these sites, never provide your credit card information, never "allow notifications," and ensure you have a strong antivirus installed on your device. However, the best way to protect your privacy is to stick to official streaming apps. Both Mp4moviez and Filmyzilla are "torrent" or "piracy"