User-Friendly

[Little_Girl]

User-friendly describes a hardware device or software interface that is easy to use. It is friendly to the user, meaning it is not difficult to learn or understand. While user-friendly is a subjective term, the following are several common attributes found in user-friendly interfaces.
The goal of a user-friendly product is to provide a good user experience (or UX). This may look different depending on the end user for whom the product is designed. For example, a user-friendly kids game will have a much different interface than a professional CAD program. However, the rules above apply to both types of software. Even if a program has many advanced features, it is still possible to make it user-friendly by designing a simple, clean, and intuitive interface.
User-friendly products are typically more successful than those with complex, convoluted interfaces that are difficult to use. Additionally, customers often avoid unreliable products, such as software programs that are full of bugs. In order to ensure a good user experience, companies often thoroughly test their products before releasing them to the public.

[Dave Paprocki]

If something, especially something related to a computer, is user-friendly, it is simple for people to use: