Extensify brings custom app tweaks to non-jailbroken iPhones
Requires iOS 8 and above
Over the past seven and a half years since the App Store launched in July 2008, Apple’s mobile application market has blossomed from a size of just 500 applications at launch to more than 1.5 million as of last month. Unfortunately, even with all of these apps readily available, the company has been reluctantly strict in allowing developers the ability to change application functionality with their own third-party enhancements. Until last summer, the process was mostly restricted to jailbroken iOS devices and there have been few app tweaks available for non-jailbroken devices, until now.
iOS 8.1.1 said to improve performance on 4S and iPad 2

Bug fixes, stability, and performance improvements
Apple officially releases OS X Yosemite

Rolling out an iOS 8.1 update soon
Apple releases iOS 8.0.2

Fixes broken cellular, touch ID, iHealth
iOS 8 available for iPhone, iPad, iPod users

Evolution of texting and keyboard
iOS 8 rolls out on September 17th

Coming to an Apple device near you
Apple to drop key iOS 8 features

Couldn’t get them to go