What your phone LEAKS about you
If you’re holding your phone Here’s an experiment: place your phone on a flat surface, then launch your mobile browser and visit the website What Every Browser Knows About You (webkay.robinlinus .com). Swipe down the page to the Gyroscope section and the site will tell you: “Your Device is probably laying on a Table”. Now, pick up your phone and the text will instantly change to say: “Your Device is probably in your Hands”.Spooky, eh? Well, not really, when you
consider that most smartphones have a built-in compass (or gyroscope) that shares your device’s orientation with the web so you can accurately use services such as Google Maps. Unless you can hold your phone completely still, the ultra-sensitive compass sensor will reveal that your phone is not immobile.
Everywhere you’ve been Although your phone has many legitimate reasons for sharing your location – such as getting directions, checking the weather and geo-tagging photos – you may feel less comfortable that it stores details of every place you go. Apple says this is “to learn places that are significant to you and provide you with personalised services”, while Google claims it “helps you get better results andrecommendations across Google products”. Both companies insist that you’re in control of this data, but it still feels like your every move is being stalked. To see what your Android phone leaks about your travels, launch Google Maps, open the main menu and tap ‘Your timeline’. Here, you’ll find a list and a map of all the places you’ve been over the past day, week, month and beyond, as well as the distance covered and even whether you were walking, driving or on public transport. On your iPhone, go to Settings, Privacy,Location Services, System Services and tap Frequent Locations to see the places you’ve visited recently and most often.
How to plug the leak To erase Google Maps data for a specific day, open the menu in the top-right corner of your timeline and choose ‘Delete day’. For a more thorough wipe, select Settings and tap ‘Delete all Location History’, then set Location History to Off. On iOS, tap Clear History and switch off Frequent Locations.
Things that you’re interested in
Adverts that appear on your phone aren’t merely annoying, they can also be creepy – seeming to know what you’ve been looking at and even where you are. This is because both Google and Apple build an advertising profile of you, based on the things they think you like, the places you go and your estimated age, gender, parental status, income and more. This data is then shared with Android and iOS apps, so they can target you accordingly and convince you to tap their ads. It’s like having a spy in your pocket, constantly reporting back to advertisers.
How to plug the leak To stop personalised ads on Android, find the Google Settings app – on some phones you tap Google within the standard Settings app. Select Ads, then choose ‘Opt out of Ads Personalisation’ and tap ‘Reset advertising ID’ to clear your profile. On iOS, go to Settings, Privacy, Advertising and tap Limit Ad Tracking and Reset Advertising Identifier. You can also turn off location-based advertising in Privacy, Location Services, System Services. Changing these settings won’t stop adverts altogether, but it will prevent them from tracking you.
Where your photos were taken All digital cameras record EXIF (Exchangeable Image File) data, which stores various details such as when a picture was taken, the ISO speed and the aperture. But phones go a step further by including the location, too. This makes it easy to browse photos taken in the same place, and saves you tagging them manually, but if you share your snaps online it could compromise your privacy. For example, a selfie shot in your bedroom could show a stranger – and a potential burglar – where you live.