How To Fix an iPhone that’s Running Slow

Are you experiencing a slow and sluggish iPhone? If so, you’re not alone! Many iPhone users suffer from this frustrating issue, but luckily, there are several things you can do to fix it. In this article, we’ll explore some tips and tricks to speed up your iPhone and get it running like new again.

What causes the iPhone to slow down?

There are several factors that can cause an iPhone to slow down, including the following:

1. Aging hardware

  • As your iPhone gets older, its hardware may not be able to keep up with the demands of newer apps, software updates, and advanced features. Older iPhones may struggle due to less-capable processors, slower storage, and reduced RAM.

2. iOS updates

  • New iOS updates are designed to support and enhance the latest iPhone models and features. While Apple aims to maintain compatibility with older devices, newer updates may require more processing power and memory, causing older iPhones to slow down.

3. Storage issues

  • An iPhone operating with limited storage space can exhibit slower performance. When your device is running low on storage, the system may struggle to perform basic operations such as app updates, caching, and swapping data.

4. App background activities

  • Some apps continue to run background activities even when you’re not using them, consuming resources and affecting overall performance. Social media apps, email clients, and messaging platforms are common culprits.

5. Battery condition

  • As an iPhone’s battery ages, its capacity decreases, leading to decreased performance. Apple implemented a feature to slow down older iPhones with degraded batteries to prevent unexpected shutdowns. You can check your battery’s health in Settings > Battery > Battery Health.

To optimize your iPhone’s performance, try the following:

  • Keep your iOS up-to-date by installing the latest updates.
  • Delete unnecessary apps and clear app caches to free up storage.
  • Limit background activities for apps (adjust settings in `Settings > General > Background App Refresh`).
  • Replace your battery if its health is poor (typically below 80% capacity).
  • Perform a factory reset to clean up your iPhone and start fresh (remember to backup your data before doing this).

Please note that if your iPhone is extremely old, it may be time to consider upgrading to a newer model with better hardware capabilities.

Recommended Solutions

Try any of the following procedures to eliminate common factors that might have caused your iPhone to slow down.

1st solution: Clear App Caches

Clearing app caches is necessary when an iPhone slows down because accumulated cache files consume valuable storage space, which can impact overall performance. Moreover, clearing cache files from apps can help eliminate potential data corruption, leading to improved app functionality and device responsiveness.

fix iphone running slow offload apps

Clearing app caches on an iPhone is a straightforward process. Here’s how it’s done:

  • Launch the Settings app on your iPhone.
  • Go to General > iPhone Storage.
  • Scroll down and select the app you want to clear the cache for.
  • Tap Offload App or Delete App, and then reinstall it from the App Store or by tapping on the app’s icon from the Home screen.

2nd solution: Restart Your iPhone (soft reset)

Restarting an iPhone when it slows down is necessary because it helps to clear temporary files and system caches, freeing up memory and resources. Additionally, restarting the device can resolve potential software glitches, resulting in improved performance and responsiveness.

fix iphone running slow restart

To restart your iPhone, do the following:

  • Press and hold the power button until “Slide to power off” appears on the screen.
  • Swipe the slider to the right to power off your iPhone.
  • Press and hold the power button until the Apple logo appears on the screen. 

3rd solution: Update iOS

Your iPhone’s software can also play a role in slowing down your phone. Apple regularly releases updates that include bug fixes and feature improvements. 

fix iphone running slow update

Updating to the latest version of iOS could potentially solve performance issues with your iPhone. 

To check if there’s a new iOS update available and install it, do the following:

  • Launch the “Settings” app on your iPhone.
  • Go to General > Software Update.
  • If there’s a new update available, follow the on-screen instructions to download and install it.

Make sure that your iPhone has ample storage space, is sufficiently charged and connected to a stable internet preferably Wi-Fi network.

4th solution: Reset All Settings

Resetting your iPhone’s settings to default can also solve performance issues caused by software glitches. Note that this process will erase all your personalized settings, so you’ll need to set them up again. 

fix iphone running slow reset all settings

Downloaded apps and saved files from the iOS storage won’t be affected in the process so you won’t lose any important data afterwards. 

To reset all settings on your iPhone, do the following:

  • Launch the “Settings” app on your iPhone.
  • Go to “General > Reset”.
  • Select “Reset All Settings”.
  • Enter your passcode if prompted.

5th solution: Restore Your iPhone (factory reset)

Restoring your iPhone to its factory settings is the ultimate option if all other methods fail. This process erases all the data and installed apps from your iPhone and returns it to its original state. 

fix iphone running slow factory reset

To factory reset your iPhone via settings, follow these steps:

1. Backup your data

  • Before factory resetting your iPhone, it’s essential to create a backup using iCloud or iTunes to avoid data loss. This way, you can restore your files and settings to your freshly-reset iPhone or a new device.

2. Factory Reset

  • On your iPhone, go to `Settings > General > Transfer or Reset iPhone > Erase All Content and Settings`. Confirm by entering your passcode or Apple ID password when prompted. The process will erase all of your data, reset all settings, and restore your iPhone to its factory default state.

After the reset process is complete, your iPhone will restart, displaying the initial setup screen. You can now set up your iPhone as a new device or restore your previously backed-up data.

If your iPhone is very slow and keeps freezing, you can do a factory reset (iOS restore) via iTunes instead. Here’s how it’s done:

  • Connect your iPhone to your computer.
  • Launch iTunes or Finder.
  • Click on your iPhone’s icon.
  • Select “Restore iPhone”.
  • Follow the on-screen instructions.
fix iphone running slow itunes restore

If the problem persists after performing all the above solutions, there’s a good chance that hardware damage is present on your device. In this case, taking a trip to an Apple-authorized service center would be necessary.


Here are some frequently asked questions about an iPhone that’s running slow:

1. Why is my iPhone running slow?

  • A slow-performing iPhone can be caused by several factors, such as outdated software, low storage space, app caches, and software glitches. 

2. How do I check if my iPhone is running slow?

  • You can tell if your iPhone is running slow if the apps take longer than usual to launch, it takes longer to load a webpage, or if you experience lagging and freezing.

3. What can I do to speed up my iPhone?

  • To speed up your iPhone, you can try clearing app caches, restarting your phone, updating to the latest iOS version, resetting all settings, or restoring your iPhone to its factory settings.

4. How do I clear the cache on my iPhone?

  • You can clear the cache on your iPhone by going to “Settings” > “General” > “iPhone Storage” and selecting the app you want to clear the cache for. Then, tap “Offload App” or “Delete App,” and then reinstall it from the App Store.

5. What should I do if my iPhone is still slow after trying all the methods above?

  • If your iPhone is still slow after trying all the methods above, you can consult an Apple support representative or take your iPhone to an Apple Store for repair or replacement.

6. How much does it cost to repair an iPhone that’s running slow?

  • The cost of repairing an iPhone that’s running slow can vary depending on several factors, such as the model of your iPhone, the extent of the damage, and whether it’s covered by AppleCare+ or not. Consult an Apple support representative for a quote. 


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