The Una watch is a modular, repairable GPS running watch from Scottish startup Una, founded by Lewis Allison, former CTO of Shot Scope. Priced at $199, it emphasizes sustainability and user control with an open-source platform. The 46mm design features a 1.2-inch Memory In Pixel LCD, 240 x 240 resolution, and hardened mineral glass.

It breaks down into six parts using Torx T3 screws, with separate modules for GPS, Bluetooth, and a Core housing a Cortex-M33 microcontroller, 2.5MB RAM, and 4GB eMMC storage. Running Free RTOS, it includes a PPG sensor and 280mAh battery offering 7–10 days of use or 20 hours with GPS. While IPX5-rated for rain and sweat, its exposed USB-C port and modularity limit ruggedness.

Software remains immature, but the open-source approach invites developer customization.