A Bike Computer and Sports Watch in One Modular Device

A Bike Computer and Sports Watch in One Modular Device

MossCode PHI is a two-part device that works as a bike computer and sports watch. The Dial is a round AMOLED unit that mounts on the handlebars, and the Band is a 9.9 g sensor pod that stays on the wrist. Attach the Dial to the Band and, in the company's words, it "becomes a complete GPS sport watch." Remove the Dial and "the Band stays on your wrist," tracking continuously. The pages pitch the setup to gravel riders and multi-sport athletes who want health tracking through the day and a training device when they head out.

The Dial on the Bars

The Dial has a 1.54-inch round AMOLED display with 2,000 nits of peak brightness and an Always-On mode. It sits on the bars through a quarter-turn mount the company calls Garmin-compatible, though it does not guarantee other third-party mounts. For positioning it uses dual-band GNSS, meaning it receives two satellite frequencies across GPS, GLONASS, Galileo and BeiDou. Routes are planned in the app and synced to the Dial for offline maps. The map zooms in before turns, and the wrist gives a haptic alert. Data screens are customizable and switch with a wrist flip.

The Band and 24/7 Health Tracking

The Band is "thin enough to sleep in," and it handles 24/7 health tracking. It records heart rate at 100 Hz, heart rate variability (HRV), resting heart rate, sleep, blood oxygen (SpO2), respiration and recovery. Recovery metrics include overnight HRV, sleep efficiency and a Smart Recovery Alarm. The Band alone is rated 5ATM, which the company describes as shower and swim ready. The Dial in bike mode, and the Band and Dial together as a watch, are rated IP66 and IP68. The company says the device is not a medical device and that cuffless blood pressure is not offered.

Sports, Training and the App

The sports supported at launch are running, swimming, cycling, elliptical, boxing, hiking and strength training. Automatic Activity Detection combines motion and heart rate data over a 10-minute window, then asks the user to confirm the sport. For cycling, the Dial shows speed, distance, power, cadence, heart rate zones, elevation, lap times, calories and training load. It pairs with ANT+ and Bluetooth sensors, and cadence needs an external ANT+ sensor or power meter. For running, it adds Pace Curve and Running Economy. VO2 Max is recorded per sport for running and cycling. One app holds the data, with performance trends and a recovery-based training target. On iPhone, Apple Health is the main integration.

Battery, Charging, and What Comes Later

The company lists up to 15 days of battery with the Dial on the wrist, up to 5 days for the Band alone and up to 25 hours for the Dial on the bars. Charging is built into the routine. The Dial can be docked while the Band stays on the wrist, and when they reconnect, "the dial charges the band." Some features are not available at launch. Swimming is logged as a basic activity, with a dedicated swim mode planned for a future firmware update, and email retrieval is not supported. Calls and SMS appear on the wrist. Battery life varies with use, and GPS accuracy varies with conditions.