All software updates slow down phones and all phone companies perform CPU throttling as batteries age chemically. … Overall I’d say yes iOS 13 will slow down all phones solely because of new features, but it won’t be noticeable to most.

Does iOS 13 Make your phone slower?

In the past, this has been a fairly reliable indicator of how each phone will actually feel in day-to-day use. … In general, iOS 13 running on these phones is almost imperceptibly slower than the same phones running iOS 12, though in many cases performance breaks just about even.

Why is iOS 13 so slow?

If you just updated iOS 13 or ipadOS 13…

Every iPhone, iPad, or iPod touch that is updated to iOS 13 or iPadOS 13 will run through some background tasks during and after the system software update, and some of those background tasks can make the device feel like it’s running slower than it should.