ost mainstream sports watches turn into electronic waste the minute their internal cell degrades, but the Una Watch takes a deliberately contrarian route. Its price has dropped from the steep Kickstarter backing of $350 down to a much more digestible $199, positioning a genuinely repairable device squarely against the monolithic, sealed-shut alternatives dominating wrist space today. The design relies on modular mechanics paired with an open-source setup covering everything from the software development kit and housing to the circuit boards themselves.
Accessibility defines the core build rather than proprietary glue and welded edges.
Una says every component in the watch is “accessible with a standard tool,”
meaning you can actually open the thing, repair it, or upgrade it yourself without hitting a brick wall of factory service barriers. The unit packs a user-replaceable 280mAh battery with USB-C charging, mating self-service maintenance with an energy-sipping 1.2-inch MIP LCD display that squeezes up to 10 days of life out of a single charge.
Sensors and water limits
On the software and sensor front, Una invites users to hack together their own applications, leaning right into modern open development trends. Under the hood, the hardware doesn't skimp: you get dual-frequency GPS, 24/7 heart rate tracking, a barometric altimeter, a six-axis accelerometer and gyroscope, and a three-axis magnetometer. These fitness metrics offer serious tracking capabilities right out of the box, without locking your data behind a corporate paywall.
The catch—and it is a notable one—comes down to water resistance. The Una Watch is rated at a modest IPX5 for splashes and showers, meaning it is not fully waterproof and will completely rule out open-water swimming or heavy submersion. At $199, you are essentially trading aquatic sealing for transparent hardware, an open-source ideology reminiscent of the cult-classic Pebble, and total control over what sits on your wrist.