Samsung app teardown reveals Galaxy Fit4 renders in three colors

Notebookcheck has obtained 360-degree renders of the Samsung Galaxy Fit4 through an APK teardown. The assets show the fitness tracker in three colorways, with a design nearly unchanged from the Galaxy Fit3 released in February 2024.

The renders show a black model with a dark gray frame, plus white and light blue models with silver frames. The default watch face changes its accent color to match each strap. The Fit3's Pink Gold option does not appear, replaced with a new Mint colorway. The rounded rectangular display, single right-side button and silicone strap carry over from the predecessor.

The Galaxy Fit4 carries the model number SM-R391 and passed FCC certification on August 4. The filing lists Bluetooth 5.4, up from Bluetooth 5.3 on the Fit3. Earlier documentation pointed to a Goodix GH3036 optical sensor for heart rate and sleep tracking. Neither source mentions GPS or NFC.

Samsung has not announced pricing or availability. The Galaxy Fit3 currently sells for $45 on Amazon.

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Giang Bùi - Tech Writer - 173 articles published on Notebookcheck since 2026

Instead of sports, I spent my school years buried in researching about everything tech, looking into chips and specs instead of doing whatever normal kids did. I am now writing for NotebookCheck, hoping that research finally reaches more people than just me and a text file.