iPhone Virtual Keyboard assistance

Has anyone created their own custom virtual keyboard for an IOS app? Instead of using the built in Apple one? About to possibly embark on that long challenging task, but was hoping that it already exists, and is a purchasable option? Pls let me know! Thanks - Jerry

UPDATE: So, didn’t get very far with finding any existing Virtual Keyboards for touch devices, so we created our own: hit me up if you want to know how to get this. The UE Marketplace said they werent interested in it… but I’m sure it would save a lot of time for anyone trying to develop their own. - Jerry