This is documentation for KaiOS, Enable tomorrow Smart Feature Phone 3.0, which is no longer actively maintained.

For up-to-date documentation, see the latest version (Smart Feature Phone 2.5).

Version: Smart Feature Phone 3.0

Building with Web technologies

To build an application for KaiOS, you need to learn three technologies:

HTML - (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content.
CSS - (Cascading Style Sheets) is a language that describes the style of an HTML document, describes how HTML elements should be displayed.
JavaScript - is a lightweight interpreted or just-in-time compiled programming language with first-class functions. JavaScript is a prototype-based, multi-paradigm, dynamic language, supporting object-oriented, imperative, and declarative styles.