Installing third-party apps on the Fitbit Versa 4 is not officially supported by Fitbit. The Versa 4, along with the Sense 2, does not allow users to install third-party apps directly from the Fitbit App Gallery. This limitation is part of Fitbit's current policy, which restricts these devices to only Fitbit and Google-developed apps and clock faces[3][4].
However, there are unofficial methods for sideloading third-party apps onto the Fitbit Versa 4. These methods involve using specific development tools and environment flags, such as enabling the `hosts` command via the `FITBIT_QA_COMMANDS` environment flag and using an unofficial drop-in package for `@fitbit/sdk-build-targets`. These approaches are provided for educational purposes and should be used at your own risk[1].
Additionally, Google has announced plans to remove third-party apps and clock faces from the Fitbit App Gallery for users in the European Union starting in June 2024. However, this change will not affect users outside the EU, and any third-party content already downloaded will remain on devices[3][7].
In summary, while there are no official channels for installing third-party apps on the Fitbit Versa 4, unofficial methods exist for developers interested in customizing their devices. However, these methods are not supported by Fitbit and should be approached with caution.
Citations:[1] https://github.com/cmengler/fitbit-app-versa4
[2] https://www.youtube.com/watch?v=MC_4AQKfc1w
[3] https://www.yahoo.com/tech/google-prepares-ditch-third-party-233018500.html
[4] https://www.youtube.com/watch?v=J104E8lWNMQ
[5] https://support.google.com/fitbit/answer/14237105?hl=en
[6] https://www.trainerroad.com/forum/t/fitbit-and-3rd-party-hrv-and-sleep-rhr-app-compatibility/53471
[7] https://support.google.com/fitbit/answer/14237121?hl=en
[8] https://community.fitbit.com/t5/Other-Versa-Smartwatches/How-do-I-add-apps-to-my-Versa/td-p/2795929