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MossCode built a modular sports watch that doubles as a bike computer
The wearable uses a detachable display and screenless tracking band to connect daily health data, training, and cycling in one system.
Published on Oct 19, 2026 by Jake Heyen Most athletes who want detailed training and recovery data end up using more than one device.
MossCode is trying to solve that with its new modular sports watch.
The MossCode PHI combines a GPS sports watch, screenless fitness tracker, and bike computer in one system. Its display can detach from the band and move onto a bike, while a lightweight sensor band stays behind to keep tracking the body.
One wearable, three ways to use it
PHI is built around two pieces: the Dial and the Band.
Together, they work like a traditional GPS sports watch for workouts, navigation, and everyday use. Remove the Dial, and the 9.9-gram screenless Band stays on the wrist to track signals including heart rate, HRV, sleep, SpO2, and respiration.
MossCode PHI uses a detachable Dial and screenless Band to shift between wrist-based tracking and cycling.
For cycling, MossCode’s MagShift system lets the Dial slide off the band and onto the handlebars. It then works as a bike computer with navigation and live ride data, while the Band continues collecting health data from the wrist.
When the ride is over, the Dial reconnects to the Band and the training and body data remain part of the same system.
Built around continuous tracking
The modular setup is also designed to reduce gaps in health and recovery data.
The Band can operate independently for up to five days, and the Dial can transfer power back to it when they’re connected. The full watch is rated for up to 15 days of battery life, while cycling use with navigation can reach up to 25 hours depending on settings.
For training, PHI supports dual-band GNSS, offline maps, ANT+ and Bluetooth sensors, and a 1.54-inch AMOLED display that reaches up to 2,000 nits.
So, instead of using one device for workouts, another for recovery, and a separate computer on the bike, MossCode wants those jobs to live inside one connected system.
Where to get it
MossCode PHI is currently in pre-launch testing. Interested users can join the waitlist for launch updates and future beta testing opportunities.
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