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

You can easily change payment method on Uber to the card or mobile payment service you prefer to use.

Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.

Your smartphone is full of surprises. There's an app if you want to use your phone as a magnifying glass or scanner. Tap or click here for hidden apps on your smartphone and how to find them.