Why You Might Want to Install It
There are three reasons why you might want to install the iOS 8.4.1 update right now. The first is if you use Apple Music.
The iOS 8.4.1 update's fixes are aimed at improving the company's brand new music platform. It doesn't deliver a laundry list of enhancements but the fixes have helped to further stabilize some features that arrived with Apple's iOS 8.4 release in June.
The other reason to install iOS 8.4.1 is if you're suffering from unfixable problems. The iOS 8.4.1 update's change log only lists fixes for Apple Music but in our experience, iOS updates sometimes fix issues that aren't listed on the change log. So if you can't find a fix, iOS 8.4.1 might be worth a try. It might iron things out.
And finally, the iOS 8.4.1 update comes with a ton of security enhancements. If you store sensitive files on your iPhone 6, these security fixes might make the iOS 8.4.1 update worth the download.