Mobile engagement platform Localytics has been tracking the usage of various iPhone models. According to the most recent data, the new Apple iPhone 7 and Apple iPhone 7 Plus are already more popular than the Apple iPhone SE. The latter represents 2.6% of active iPhone models in use, while the recently launched iPhone 7 and iPhone 7 Plus represent a full percentage point more of active iPhones at 3.6%. We can break that down some more. The iPhone 7 makes up 2.7% of active iPhone handsets in use, while the iPhone 7 Plus accounts for .9% of active iPhone units.

The most popular active iPhone models right now are the Apple iPhone 6 and Apple iPhone 6 Plus with a combined 38.3% of iPhone units now being used. The phones are old enough to have generated several years' worth of sales, but aren't too old as to be irrelevant. Next is the Apple iPhone 6s and Apple iPhone 6s Plus with 27.5% of active iPhone usage. The Apple iPhone 5 series accounts for 24.4% of the iPhone models in use today. That drops off sharply to the 3.7% usage generated by the Apple iPhone 4 and Apple iPhone 4s.

As the next few months play out, we should see the usage attributable to the iPhone 7 models grow and overtake the iPhone 4 units. The current front runners (the iPhone 6 and iPhone 6 Plus) will decline, making up a smaller percentage of active iPhone models, and the iPhone 6s and iPhone 6s Plus will take over the lead.