Do you want a dead Ipad 4?
Mine with it and you can very quickly!
And other note: it will generate very low Hashrate. Litecoin needs lots of computing power and lots of memory.
An i5 2nd generation with only 2GB RAM avaible generate no more than 11kH/s (I tested this)
Im not sure what the ipad has compared to my android phone, but i can get less than 1KH/s with it. Not impressive by any means. :/