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Most of us have a wide selection of apps installed on our phones, many of which can access our location. While that can be useful for maps and weather apps, you might find that other apps are requesting more than they need.
On the plus side, checking which apps can track your whereabouts takes less than a minute. Both iPhone and Android have built-in controls that let you review permissions and block location access. Below, we explain how to take control of your location privacy and what to look out for.

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Seeing an app with location access isn't necessarily a cause for concern. You might have granted permission when using a feature that needed to know where you were.
But location information is personal data. If collected regularly, it could reveal details such as your home address, workplace or places you visit as part of your daily routine.
There's little reason to share that information with apps that don't need it, so pay attention to those with access all the time. Consider restricting permissions if you're unsure why an app needs to know where you are.

To check which apps can access your location, open Settings and select Location. The exact steps and menu names can vary slightly depending on your phone and version of Android.
From here, you'll see Recent access, which shows apps that have recently used your location, plus App location permissions, which shows your apps grouped by their level of location access.
Once you've tapped App location permissions, pay attention to the Allowed all the time heading. Apps listed here can access your location even when you aren't actively using them.
Tap an app to see and change its level of access. You can choose a more restrictive setting or toggle off Use precise location if the app doesn't need to know exactly where you are.
If you're using a Samsung Galaxy, open Settings > Location > App permissions. You'll see your apps grouped by how much location access they have, including Allowed all the time, Allowed only while in use and Not allowed.
Tap an app to change its permission. You can restrict when it has access to your location or switch off Use precise location if an approximate location is enough.

On an iPhone, head to Settings > Privacy & Security > Location Services. This gives you an overview of the apps that have asked to use your location and the access you've given them.
Scroll through the list and look for any apps marked Always. As the name suggests, this setting means an app can access your location even when you're not using it, so it's worth considering whether that level of access is really necessary.
Select an app and you can change its permission. The options vary depending on the app, but can include Never, Ask Next Time Or When I Share, While Using the App and Always. Choosing While Using the App means it can access your location when the app or one of its features is visible on screen.
You can also toggle Precise location on or off. With this switched off, the app gets your approximate location rather than your exact position, which might be all it needs to work properly.

'It's always healthy to question why an app is asking for your location. The best approach is to look at context and whether tracking makes sense for what the app actually does.
'Map apps, taxi and food delivery services are obvious examples where location can be important. For other apps, you might find that limiting access to when you're using the app is enough. Apps that frequently check your location in the background can also use additional battery power.
'If you're unsure, you can always restrict an app's location access and see whether the features you use still work as expected. You can change the permission again later if you need to.'
Adam Speight, Which? smartphones expert
While reviewing permissions, look through your installed apps for anything unfamiliar. An app you don't recognise isn't necessarily suspicious, but it's worth checking what it is.
For more details on how to keep your personal information hidden from prying eyes, see our guide to 10 things every smartphone owner should do to keep their data safe.

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