Originally Posted by
ads13 Aside this, why only android offers Pattern lock as optional feature to keep our data safe.
Reason
#1 : The 'S' in 'pattern' stands for 'safe'.
Reason
#2 : Android offers everything. Which is its Curse and Blessing at the same time. You can have a plethora of everything in every way, and personally I find it more confusing and annoying than helpful.
So just because it's there doesn't mean it's necessary or useful. We call that "Featuritis", the mania of having long feature lists to impress customers with.