You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.
Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.
Turn your smartphone into a professional car diagnostic tool with a $15-30 OBD2 adapter and free apps that read engine codes in seconds.
To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.
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