Your iPhone Has Become Too Slow
One of the best things about the iPhone is that it performs well even after several years of use, but that might not always be the case.
While your iPhone might still get software updates, they might be too big or demanding for it to work properly.
Not only that but with apps and games constantly adding new features and updates, your iPhone might not be able to run your favorite apps as smoothly as before.
Unfortunately, besides trying to restart your iPhone, there isn’t a way to fix this issue. The only thing you can do is upgrade to a newer, more powerful iPhone.