[DigitalToday reporter Jinju Hong] If an older iPhone feels slower, it may be worth checking basic steps such as clearing storage, checking the battery and reducing background functions before switching to a new device, IT media outlet Engadget reported on Oct. 20 (local time).

A decline in iPhone performance may not be due only to aging hardware. Factors such as lack of storage space, accumulated system data and battery degradation can also work together.

The first thing to check is storage space. iOS needs free space to handle caches, temporary files and update files. If internal storage runs low, even small tasks such as processing messages can pile up and slow overall responsiveness. In the guidance cited, it noted that leaving at least about 10 percent of total capacity free can help smooth operation, though it is not from Apple. For a 128GB model, that is about 12.8GB.

In the Settings app, users can go to General and then iPhone Storage to see items that take up a lot of space, such as photos, videos, messages and offline saved content. Apps that are not used often can be deleted. They can also be managed with the offload function, which removes the app while keeping app data. iPhones can also be set to offload unused apps automatically.

For users who use iCloud, optimizing photo storage is another option. When enabled, the device keeps only low-resolution copies and downloads originals again when needed, reducing storage use. Deleting Safari browsing history and website data may not have a big effect, but it was presented as something to check if it has not been cleared for a long time.

Some changes can improve perceived performance through settings alone. A representative item is Background App Refresh. It lets apps fetch new content and update data in the background, improving convenience, but it can add load on older iPhones. Users can turn it off entirely or disable it by app.

The suggestions also included reducing visual effects. The iPhone interface applies real-time animations when launching and switching apps and opening Control Center, and on older devices those effects can increase graphics processing load. Turning on Reduce Motion in the Accessibility menu reduces the parallax effect on the home screen and changes app switching from a zoom effect to a fade. Turning on Reduce Transparency changes the blurred background of Control Center or the dock to something closer to a solid color. The outlet reported that the existing 'Liquid Glass effect' could be reduced in that case, but the iPhone may feel faster and heating during use may fall. It also said changing Haptic Touch response to faster can reduce the delay before menus appear after a long press, allowing home screen shortcuts and context menus to respond more immediately.

Battery condition is a key variable directly linked to performance decline. As a lithium-ion battery ages, it may not be able to supply power needed for normal operation in a stable way. In that case, iOS may activate a function that limits performance to prevent the device from shutting down unexpectedly. The guidance said newer iPhone batteries are designed to retain 80 percent of their original capacity even after 1,000 charge cycles, but once that level is reached, battery drain can speed up and slowdowns can also be felt.

Users can check battery health status in the battery menu in Settings, and if maximum capacity has fallen below 80 percent, it can be seen as the time to replace the battery. Replacement costs range from $69 to $129 depending on the model, and the iPhone Duo was listed at $229. Apple recommends using an Apple Store or an authorised service provider. Replacing a worn battery with a new one can improve both speed and usage time, it said.

If those steps do not solve the problem, the final resort is to reset and restore. If the same device is used for a long period, leftover update files, app data and various temporary files can build up. In such cases, erasing all content and settings and setting it up again like a new device can restore performance. A full backup to iCloud or to a Mac or PC is a prerequisite. Users can restore from a backup and start again, but the guidance said that for performance improvements alone, setting up from scratch like a new device may be more effective.

Ultimately, the core point is that slowdowns on older iPhones are not simply a matter of device lifespan. After step-by-step measures such as freeing up storage space, reducing background load, adjusting visual effects, replacing the battery and resetting, there may still be room to delay the time to replace the device.