You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.

Turn your smartphone into a professional car diagnostic tool with a $15-30 OBD2 adapter and free apps that read engine codes in seconds.

From Aadhaar cards to currency notes, scanning physical documents is a common task most of us perform using our smartphones. While scanning documents on Android devices is quick and easy, many users ...