I have 5 iOS devices, all with k&d installed. The 2nd gen iPod touch lags for around 5 min every hour or just shuts down on me. My 2nd gen iPad is about the same as iPod touch lag time. My 3rd gen iPad has about 30 sec lag. The 4th gen iPad barely has any lag at all as well as my iPhone 5s. I used to have another acct with 1st gen iPad but they excised those 9 months ago.