When and why to restart an app

Restarting an process is the first thing to try when an app freezes, crashes, or stops responding. Most of the time, a restart clears out temporary files and memory that the app was using, and the problem goes away. You do not need to uninstall anything or change settings — you are just closing the app completely and opening it fresh.

Apps can get stuck for straightforward reasons: they ran out of memory, they lost connection to the internet mid-task, or they hit a bug that only happens once in a while. A restart gives the app a clean slate. If the problem comes back when ready after you restart, then you have a real issue to investigate — but most of the time, restarting solves it.

Key Takeaways

  • Restarting an app means closing it completely and opening it again, which clears temporary files and memory the app was using.
  • On Android, swipe up from the bottom or use the recent apps button, then swipe the app card away; on iPhone, swipe up from the bottom or use the app switcher.
  • If an app will not close normally, force-stop it on Android through Settings > Apps, or force-quit it on iPhone by holding the power button and volume button together.
  • A restart usually takes less than a minute and should be your first step before uninstalling or reinstalling the app.

How to restart an app on Android

The easiest way is to use your recent apps view. Swipe up from the bottom of the screen and hold for a moment — you will see all the apps you have open. Find the one that is not working and swipe it upward or to the side to close it. Wait a few seconds, then tap the app icon to open it again.

If your phone has a physical or on-screen recent apps button (usually three vertical lines or dots), tap that instead, then swipe the app away. Either method does the same thing: it closes the app completely so it starts fresh when you open it next.

How to restart an app on iPhone

Swipe up from the bottom of the screen to open the app switcher, or if you have an older iPhone with a home button, double-tap the home button instead. You will see cards showing each open app. Find the app that is frozen or crashing and swipe it upward to close it. Wait a moment, then tap the app icon on your home screen to reopen it.

The motion is important: you are swiping the card up and off the screen, not just tapping it. If you tap the card, it will just bring that app to the front instead of closing it.

Force-stopping an app that will not close

Sometimes an app is so frozen that the normal close method does not work. On Android, go to Settings, then Apps (or process Manager, depending on your phone). Find the app in the list and tap it. You will see a button that says "Force Stop" — tap that. The app will close when ready, even if it is not responding.

On iPhone, you cannot force-stop an app the same way. Instead, hold down the power button and one of the volume buttons at the same time until you see the power-off slider. Let go, then when ready press and hold the home button (or swipe up from the bottom if you have no home button) to get back to the home screen. This forces the app to close. Open it again normally.

What to do if restarting does not fix the problem

If the app crashes or freezes again right after you restart it, the problem is not temporary. Before you uninstall and reinstall, check whether an update is available. Open your app store (Google Play on Android, the App Store on iPhone), search for the app, and see if an "Update" button appears. If it does, tap it. Many crashes are fixed in updates.

If the app is already up to date and still crashes, try clearing the app's cache. On Android, go to Settings > Apps, find the app, tap Storage, and tap "Clear Cache" (not "Clear Data" — that will erase your saved information inside the app). On iPhone, you can only clear cache by uninstalling and reinstalling the app, which takes a few minutes.

Restarting your phone instead of just the app

If multiple apps are crashing or freezing, the problem might be your phone itself, not the individual apps. Restart your entire phone by holding the power button until the power-off slider appears, then slide it. Wait 30 seconds, then hold the power button again to turn it back on. This clears memory and temporary files across your whole phone.

A full phone restart is more powerful than closing a single app, but it takes longer. Use it when restarting individual apps does not help, or when you notice your phone is running slowly in general.

Frequently Asked Questions

Will restarting an app delete my data or messages?

No. Restarting just closes and reopens the app. Any messages, photos, or information you saved inside the app stays there. The app will open to wherever you left off, or to the home screen if it crashed.

How long should I wait between closing an app and reopening it?

A few seconds is enough. You do not need to wait a full minute. The app needs time to close completely and clear from your phone's memory, which usually happens in two to five seconds.

Is force-stopping an app safe?

Yes. Force-stopping is safe and does not damage the app or your phone. It is the same as if the app crashed on its own. You might lose unsaved work inside the app, but nothing else is affected.

Should I restart my phone every day to keep apps running smoothly?

You do not need to restart daily, but restarting once a week can help if you notice apps running slowly or crashing often. It is not necessary for normal use, but it does not hurt.