As I told you above that first of all you’ll have to jailbreak your iPhone or iPadand then install Cydia in your device. Once you install Cydia software, search for “Android lock for free”.
Now, you’ll have to download and install this app in your iPhone or iPad device.
To activate the pattern lock, go to Settings, tap Android Lock and then tapChange Pattern. Now, create a pattern you would like to add on your device.
That’s all. After that, whenever you will open your iPhone or iPad it will ask show you pattern lock like Android and by verifying the pattern you created in your iPhone/iPad settings you’ll be able to enter the phone.