Open-source might not be the first thing you think of with Windows, but these free tools can seriously boost your productivity.

In fact, if you have a Shortcut for it, you can open any app just by tapping the back of your iPhone. All you need to do is set up the secret "button".

From now on, when you open your Files app, you'll see a menu option for Microsoft OneDrive on your sidebar with your saved content.

When it comes to converting file extensions on your iPhone, don't worry about downloading a third-party app when you can make the changes yourself.