Hello, guys! I found a way to get a major speed bump on the iOS 8.1 user interface. This is especially recommended for older models, such as iPhone 5 and 4S (A7 chip is still good with iOS 8). First trick: - Settings > General > Accessibility > Increase Contrast > Reduce Transparency Second trick: - Disable the predictive keyboard. Now, you may notice that your UI is ugly as hell with transparency off... To fix this problem, set the background I did. Now you should notice that your iPhone is faster and more responsive in everything. Someone advises to reduce motion, too, but I found out it's useless: it doesn't speed up the phone since the time you have to wait before tapping becomes responsive is the same the animation takes. Hope this helps. Let me know! PS: iOS 8.2 may improve performances. Until then, this trick is really sweet.