FNaF World (Mobile) was the mobile port of the original FNaF World, released for Android on January 12, 2017, and was removed the following day. There was an iOS port planned, but after FNaF World's future updates being cancelled, it was never released. The only way to get the Android version is to look for an .apk file of it.
Some animations have been removed due to memory capacities like removing the animation of enemies and NPC's.
Idle Animations are very fast.
Only Dee Dee and Fredbear are not affected by the moving animations
Freddy's walking is very slow, though it looks like it only affects older Android phones.
Freddy in the overworld moves slower on older devices.
Some attacks do not work sometimes.
Enemies and Animatronics disappear sometimes even if they're not dead.
The main menu music doesn't play most the time.
The victory theme still plays after a battle, including when running is successful.
If the player runs away from a challenger, that challenger is added in the party even if it was not defeated.
Save file data appears to delete itself sometimes if the game is closed a certain way.
The Game Will Crash on random occasions
While most of the games of the franchise had between a few days and about 2 months to have a mobile version, the mobile version of FNaF World released almost a year after the release of the PC version.
After the port's release, many fans noticed how Scott disliked the game foretold in dialogue.
After that, the game was removed from mobile ports, saying Scott will not touch the game again.
The iOS version and Update 3 of FNaF World were cancelled by Scott.