Fitbit SDK Guides

These resources will help you understand how to use each element of the Fitbit SDK. You’ll find guides for:

Explore the basic building blocks of a Fitbit app and how they fit together

Learn how to create, build and screenshot projects using the CLI.

Learn how the companion API enhances Fitbit apps with an additional JavaScript runtime environment

Learn how the File System API allows developers to read and write files on the Fitbit device

If you want to understand some of the terminology used in the guides, please read our Glossary

Learn how to migrate your application between SDK versions

Apps must be granted permissions by the user in order to use specific APIs

Learn how the Sensor APIs connect developers with the hardware sensors embedded in Fitbit devices

Learn how to build UI using SVG, CSS and JavaScript.

Learn how the Clock API handles tick events with the correct precision and timing

Learn how to send and receive data or transfer files between Fitbit devices and mobile devices

Design clocks and apps with our system of visual styles and components.

Understand how to access the physical location of a device using GPS

Understand how to localize your apps and clocks.

Learn how to build for multiple device targets simultaneously

Learn how to publish your apps and clocks to the Fitbit App Gallery

Learn how to create a settings definition file so you can make your app configurable by users