Transferring data from smaller-screened models is causing a problem on the new iPhones
Now, something new has been affecting those with the latest iPhone models. Apparently, stock apps including Calculator, Wallet, Weather, Calendar, Health and Watch are being rendered all wrong on the iPhone 6s and iPhone 6s Plus. If you used iCloud to transfer the content on these apps from the smaller screened Apple iPhone 5, Apple iPhone 5s and Apple iPhone 5c (running on iOS 9) to the iPhone 6s or iPhone 6s Plus, you might see the edges cut off the sides of the apps when you open them on the newest iPhone models.
A workaround is available, although it is counter intuitive. You need to turn on the "Display Zoom" setting before opening one of the affected apps. To do that, go to Settings > Display & Brightness > View > Zoomed, and then open the app in question, like Wallet. When you're finished with the specific app, you will have to turn off "Display Zoom," or else other apps will look too big. Another idea, which is more time consuming, is to set up your iPhone as a new device, eliminating the transfer of data from smaller screened iPhone models.
There is hope that you won't have to continuously worry about a workaround. Apparently, iOS 9.1 beta 3 eliminates this issue, hinting that the problem will be dealt with in iOS 9.1.
source: MacRumors via RedmondPie