Luffu Link Is a Screenless Family Health Wearable From Fitbit's Founders

Luffu Link Is a Screenless Family Health Wearable From Fitbit's Founders

Most wearables put a screen on the wrist and expect a person to check it. Luffu Link, the first hardware product from Luffu, skips that entirely: it's a screenless family health wearable built to work quietly in the background rather than demand attention. The company was founded by James Park and Eric Friedman, Fitbit's original co-founders, and Luffu Link follows the Luffu smartphone app as the second piece of what the company calls its family care ecosystem.

What It Actually Tracks and Reports

Luffu Link continuously monitors activity, steps, sleep, heart rate, and heart rate variability, syncing that data automatically to the Luffu app. According to Luffu, the device learns a wearer's daily rhythm over time and looks for meaningful changes rather than just logging raw numbers. A built-in speaker and voice-driven AI logging let a wearer capture details by speaking, whether that's a medication taken, a symptom, a meal, or a mood, without needing to type anything into a phone.

Built to Work Without a Phone Nearby

Luffu Link includes its own 4G LTE-M cellular connection and onboard GPS, and Luffu states this cellular service is included with no separate carrier plan required. That connection is what lets the device share location and reach trusted contacts even when a wearer's phone is in another room entirely. A single press sends a help request along with contextual information like location and recent health data to preset contacts, while a double press sends a lighter check-in letting family know the wearer is okay, without needing a call or text.

Luffu is direct about what this isn't: the device does not call 911 or dispatch police, fire, or emergency services. It only reaches the specific trusted contacts a wearer has set up in the app, and Luffu notes these connectivity features depend on cellular signal quality, working less reliably indoors, in poor-signal areas, or outside the United States, where the service doesn't work at all.

Physical Design and Basic Specs

Luffu designed the band to look like jewelry rather than a fitness tracker, offering it in three finishes: Halo Gold, Onyx Black, and Sterling Blue, with both large and small silicone bands included in the box alongside a quick charger. The company rates battery life at up to five days under a specific usage pattern: continuous health tracking, GPS turned off, a paired Bluetooth connection to a phone, several voice logs a day, and only help messages sent over LTE. Luffu states heavier use of any of those features will shorten that window. The device is water-resistant to 50 meters, though Luffu recommends against wearing it in a shower, bathtub, or hot tub, and a full charge takes a little over an hour, reaching 80 percent in roughly 20 minutes.

What's Still Ahead of This Product

Luffu Link has not shipped yet. Using the device also requires a separate Luffu Family Plan subscription, covering up to four or eight family members depending on tier, which Luffu states will only become available once the app itself launches more broadly later this year.

Luffu is also explicit in its own disclaimers that the tracked health data is intended for wellness purposes only and isn't meant for medical use, and that the device currently works only within the United States. Because nothing has shipped yet, claims about how well the system actually learns a wearer's rhythm and flags meaningful changes remain the company's own description rather than something outside users have tested.