It happens every year after the release of the new version of iOS: users who update complain about crashes, slowness and how little battery life lasts. Complaints about how Apple is leaving older devices behind by "forcing" users to renew their iPhones are multiplying across the webwhile others maintain that their iPhones work fine without any problems.
Who has the reason? Is it true that Apple makes its old iPhones perform worse with updates so that people are forced to switch iPhones? Is there planned obsolescence? A study published by Futuremark denies all this by ensuring that the updates keep the iPhone working properly and prove it to us with tests carried out over months.
Futuremark has an application that the App Store that performs performance tests on our iPhone, called 3DMark. The tests are carried out at the GPU (graphics) and CPU (processor) level, and for months they have been collecting information from users who have performed tests on different iPhone models, from 5s to 7. All the information has been reflected in the graphs where we can see month by month the average score obtained by the tests carried out: in gray the results of iOS 9, in blue those of iOS 10 and in orange those of iOS 11. As you can see in the case of the iPhone 5s, the oldest model that has received iOS 11, the variation is minimal, we can even say which is graphically superior with iOS 11 than it was with iOS 9.
In the case of iPhone 66, the graphical improvement is evident with iOS 11 compared to iOS 9 and iOS 10, and it is true that with iOS 11 the CPU tests are worse than with iOS 9, but hardly unchanged compared to the latest versions of iOS 10.
In the iPhone 6s the variations are minor, and although iOS 10 was an initial improvement in both GPU and CPU, later it decreased somewhat and with the arrival of iOS 11 the level has remained unchanged.
Finally, the iPhone 7 has improved the graphic performance compared to the latest versions of iOS 10, and the CPU remains practically unchanged compared to those same versions. Supposedly we are facing objective and quantifiable dataThen there are the impressions of each one that surely do not change when seeing these graphs.