Support for the legacy Fitbit Web API ends on September 30, 2026
Important: Support for the legacy Fitbit Web API ends on September 30, 2026. After this date the API will continue to operate, but Google will no longer fix bugs or provide API support. On October 30, 2026, the Fitbit Web API will be turned off and will no longer function or sync data to or from Fitbit users. To continue accessing data for your users after this date, migrate to the Google Health API.
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Developer Blog

Announcing Fitbit OS SDK 4.0

Oct 29th, 2019

Jon Barlow

This update for the Fitbit OS SDK adds support for Versa 2 devices, provides developers with advanced cryptographic functionality, multi-view SVG, App Cluster Storage API, and much more! Read more

Announcing Fitbit OS SDK 3.1

Mar 18th, 2019

Jon Barlow

We're proud to announce the latest version of the software development kit for Fitbit OS. SDK 3.1 adds support for the new Fitbit Versa Lite, and the ability to localize your apps and clock faces with our new i18n API. Read more

Our SDK Deprecation Process

Feb 22nd, 2019

Liam McLoughlin

We have decided to document our deprecation strategy so that developers can plan their app updates accordingly, as older SDK versions are removed from Fitbit Studio and our Command Line SDK. Read more

It’s Time To Exercise With Fitbit OS 3.0

Dec 17th, 2018

Jon Barlow

This update for Fitbit Ionic and Versa smartwatches will allow developers to easily create custom exercise applications, perform faster on-device calculations, launch other applications, upload files from the device to companion, and experience super fast side-loading with partial installs and compressed bundles. Read more

Announcing Fitbit OS 2.2 - The Versioning!

Oct 5th, 2018

Jon Barlow

The latest firmware update for the Fitbit Ionic and Versa smartwatches continues the evolution of Fitbit OS, and provides some great new developer functionality. Read more