differences between gadget and widget

a widget is a piece of reusable code that you can plug into virtually any website.

A gadget, however, acts just like a widget and often fulfills the same purpose, but it is proprietary. It only works on a certain website or a specific set of websites, for instance. It can also be a widget that is a technology device working in conjunction with an application.

Here are two examples:

1. Gadgets can look and act like widgets, but they only work on certain devices. For instance, the Raymio device is a wrist-worn band that helps you state safe in the sun. It's a wearable (a device that's worn) that also uses an app to give you information. 

1. A widget, on the other hand, works on any web page that lets you add an HTML block of code. You can put that code on your blog, or your personalized start page or your personal widget.