Released as a free update to the PC version (and a standalone DLC on mobile), the Halloween Edition is not a new game, but a complete aesthetic overhaul of the original FNAF 4.
The official was released as a free standalone content add-on for Windows but was never officially released as a separate app for Android. fnaf 4 halloween edition download android free
Because there is no official mobile version, many "free downloads" for Android found online are often unofficial fan-made mods or potential security risks. Released as a free update to the PC