Fitbit app 4.50 dark mode expands

Fitbit 4.50 brings a dark theme to Android and iOS ahead of a Gemini powered Coach preview.

Fitbit app 4.50 dark mode expands to Android and iOS

Fitbit is rolling out version 4.50 of its app on Android and iOS, adding a dark theme that works independently of Google's Material 3 Expressive update. The rollout follows the Made by Google 2025 event and comes as Fitbit prepares a Gemini powered Coach preview later this year. Google has widely pushed the Android version, and Pixel Watch users now see Material 3 Expressive in Fitbit Today, with Wear OS Tiles getting the bigger design update.

Original notes from the event highlighted several benefits of the dark theme: reduced eye strain in low light, potential battery savings on OLED screens, improved readability, and a sleeker overall appearance. After updating, Settings shows a Theme option with System default selected, and users can choose Light or Dark. Fitbit says most of the app will render in dark mode, though a limited number of elements may not fully adapt at launch.

The move signals Fitbit’s effort to align with Google’s evolving design language while prioritizing everyday usability. Dark mode can make late-night checking less fatiguing and could extend battery life on OLED devices, which matters for a company that prizes constant, on-screen accessibility. The update also reinforces the Wear OS strategy, tying Fitbit’s mobile experience to a broader Google ecosystem.

Still, the rollout has to navigate real-world quirks. Some elements may lag in rendering, creating early fragmentation across devices. The pace of cross-platform updates will matter for user trust as Fitbit and Google continue to synchronize future features and avoid a patchwork of experiences across Android, iOS, and Wear OS.

Highlights

The update is a small step with a bigger purpose inside the ongoing push for cohesive, user friendly wearables