Contrast

Sauna. Cold plunge. Repeat. Contrast records your heat and cold exposure sessions as real Garmin activities - no phone, no account, no subscription. Pick Sauna, Cold Plunge, or Contrast (alternating hot/cold rounds), press START, and get in. While you're in it: - Big session timer plus a per-round timer, color-coded: orange for heat, blue for cold - Live heart rate and temperature from the watch - BACK starts the next round (and flips hot/cold in Contrast mode) - each round is a lap in the saved activity - Set a target time for each phase (like 15:00 hot / 3:00 cold): the watch gives an unmissable triple buzz when you hit it, and the timer turns green while you push into overtime - No target set? A gentle buzz every 5 minutes keeps you aware of time Afterwards: - START pauses: Resume, Save, or Discard - Saved sessions sync to Garmin Connect named "Sauna", "Cold Plunge", or "Contrast", with heart rate and temperature graphs and a lap per round - Your targets are remembered for next time Honest notes: wrist heart rate is unreliable while submerged in cold water (that's physics, true of every watch app), and the built-in temperature sensor reacts slowly since it sits against your skin - it shows the hot/cold trend, not the exact water temperature. Supported devices: fēnix 6/7/8 series (including S, X, Pro, Solar, and fēnix E), Epix (Gen 2) and Epix Pro, Enduro and Enduro 3, Forerunner 165/265/570/955/965/970, Venu 2 and 3 series, vívoactive 5 and 6.

Initial release