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

WhatsApp’s built-in document scanner lets you digitize paper documents into PDFs directly from a chat on Android or iPhone, ...

You can download Twitter videos using a third-party app and save them to your desktop or mobile device.

We list the best photo recovery apps, to make it simple and easy to restore missing images and other graphics files.

WhatsApp, which has always required phone numbers for registration, is now testing a new username feature allowing users to ...

Boost your iPhone experience with 30 quick iOS shortcuts that automate daily tasks, save time, and unlock powerful hidden ...