Chronos-Bio redraws your day as a single circle. The outer ring is a full 24 hours — midnight at the top, running clockwise — split into 96 fifteen- minute blocks. Each elapsed block is coloured by what your body was doing: • BLUE — sleep and recovery • AMBER — physical activity / raised heart rate • GREEN — rest, low stress • ORANGE — higher stress or load • DIM GREY — still to come, or no data yet The blocks are back-filled from Garmin's own stress and heart-rate history and your sleep schedule, and every elapsed block is cached on the watch, so the timeline keeps its shape all day — even across a reboot. Around that band sits a clean analog clock: 12 rim markers with 12/3/6/9 emphasised, and high-contrast floating hands that taper to a sharp point and never cover the centre readout. In the middle: your live Body Battery (or Stress score), the date, and the watch battery. A dotted tick gauge along the bottom tracks a goal of your choice — steps, floors, active minutes or Body Battery. Long-press the face to open a legend that explains every colour. Built for memory-in-pixel (MIP) displays: an exact 64-colour-safe palette, one code path for the 240 / 260 / 280 round buckets, and all sensor work done once per minute in lock-step with the clock to stay light on the battery. Optionally stays fully rendered in low-power mode on non-AMOLED watches. Settings (phone Connect IQ app or the on-watch menu): – Center readout: Body Battery, Stress score, or off – Bottom gauge: off, steps, floors, active minutes, or Body Battery – Rest / stress split: 25 / 40 / 50 / 65 (50 = Garmin's rest+low band) – Activity HR threshold: auto (from resting HR) or 90–130 bpm – Date line, battery %, hour separators, long-press hint — each on/off – Always-on full face in low power (ignored on burn-in-protection screens) Round MIP and AMOLED Garmin watches: Fenix 7 / 7 Pro / 7X / 7S (Pro), Fenix 8, epix Pro, Forerunner 245 / 255 / 645 / 745 / 935 / 945 / 955 / 965 / 970 / 265 / 165 / 170, vívoactive 3 / 4 / 5 / 6, and more.

1.5 Added Face style setting: choose Digital to replace the hands and centre readout with a large digital time, plus date and battery below it. Default remains Analog. 1.3 Added outer ring setting (Now you can move the 0:00 mark from the top, to the bottom for the outer ring) 1.2 Improved design 1.1 First release.