For developers who are trying to make best use of the powerful features built into the most recent models of iPhone, it's important to know just how many of those devices are in the wild. Mixpanel recently released some information showing that the iPhone 6 models (iPhone 6/6s/6 Plus/6s Plus) make up 61.41 percent of all of the iPhones in use.
Of the remainder, the iPhone 5s makes up a hefty 19.11 percent, showing that just over 80 percent of all iPhones in use have Touch ID installed. Whether or not every user is aware of that fact or uses Touch ID on a regular basis, it says a lot about the security of the iOS platform that 80 percent of the devices can benefit from biometric security.
Older iPhone 5 models -- the iPhone 5 and iPhone 5c -- are used by another 13.53 percent of users. Just 5.93 percent are still using iPhone 4 models, and the tiny remainder -- 0.04 percent -- are making calls with the iPhone 2G, 3G or 3GS.
Apple has to be happy when looking at these statistics; those people who are not currently using an iPhone 6 or newer model are prime candidates to upgrade to those models or the iPhone 7 that should be launched later this year. While not all of the 1 billion iPhones expected to have been sold worldwide sometime this year are still in use, the potential for continued sales of the platform is staggering.