The main reasons for iPhone slowing down include system aging, insufficient storage space, too many background programs and aging battery. First, insufficient storage space will affect the running speed. It is recommended to clean up photos, videos and large-sized apps regularly, and use iCloud backup to free up space; second, timely update to the latest system version to optimize performance; third, closing unnecessary background programs and setting back-up refresh limits can reduce memory pressure; finally, if the battery health is less than 80%, the battery should be replaced to restore smoothness.

It is actually quite common for iPhone to slow down, especially after using it for a few years. The main reasons are usually concentrated in the aging of the system, insufficient storage space, and too many background programs. If you find that you have to wait for a long time to open the App on your phone, or if you slide the screen and stutter, then these are basically the reasons that are causing trouble.

Full storage space will slow down the iPhone

Many people don’t realize that once the iPhone’s storage space is almost full, the system will run slower. Especially iOS devices are not as good as Android, which can be used to plug in and expand. 128GB or 256GB is not enough.

It is recommended to clean up photos, videos and large-volume apps regularly. For example, pictures and videos in WeChat chats take up a lot of space. You can go to "Settings>General>Iphone Storage Space" to see which apps take up the most space and delete what should be deleted. In addition, using iCloud or a third-party cloud disk to back up photos and delete local files can also free up a lot of space.

The system version is too old and may slow down

Sometimes it’s not that the hardware is not working, but that the system has not been updated to the latest version. Apple optimizes new systems for old models every year, but the premise is that you need to update them in time. But don't keep stuck in the old version. For example, if you are still using iOS 14 iPhone 6s, it may be even more stuck after changing to iOS 15 or 16.

Before updating the system, you can check which version your model supports to ensure that it will not affect performance after upgrading. The update path is: Settings > General > Software Update. If the prompt is a new version but the download is slow, you can connect to Wi-Fi and try again, or go to the computer to update with iTunes.

Too many background applications lead to high memory pressure

Although iPhone can switch between multiple tasks, it can open too many apps in the background, especially some video and game apps, which will occupy a lot of memory. Over time, the system slows down.

You can double-click the Home button (or slide up from the bottom and pause) to bring up the multitasking interface, and slide up and close the unused apps one by one. You can also try to manually turn off the app every time you use it. Although it is a little troublesome, it is indeed useful for old models. In addition, you can turn off the background refresh function of some apps in the settings: "Settings> General> Backend App Refresh".

Battery aging can also limit performance

iPhone has a mechanism, when the battery health drops to a certain level, the system will automatically reduce the frequency to protect the hardware. At this time, you will feel that your phone is getting slower and slower, and even occasionally restart the screen suddenly.

In this case, you can go to "Settings > Battery > Battery Health" to see the maximum capacity. If it is less than 80%, it is recommended to change the battery. Apple's official battery replacement price is not too high, and the after-sales service is reliable. After changing the battery, many old iPhones can significantly become smoother.

Basically these common reasons. Not a big problem, but it is easily overlooked. Pay attention to cleaning, updating and maintaining it in daily life, and the iPhone can still maintain a good experience after three or four years of use.

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