Healthy Habit Tracker: Tervy

You changed something. Did your body notice?

Tervy is a habit tracker for health changes. Start a change, like no alcohol on weeknights, in bed by 22:30, no coffee after noon or a daily walk. Mark it in one tap a day. Tervy then shows you, on one timeline, what your body did meanwhile: resting heart rate, sleep, HRV and more, read from Apple Health and put in plain words against your own usual range.

Tervy shows what moved. It never claims which change moved it: you know your life, so you judge. And when nothing moved, it tells you so.

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HOW IT WORKS

• Start a change in seconds. Pick a ready-made start or make your own: a yes/no habit, or an amount with a target ("at least 8 glasses", "at most 2 coffees").

• One tap a day. Done, Not today or Skip. Any honest answer keeps your streak.

• Your watch does the rest. Tervy reads resting heart rate, sleeping heart rate, HRV, sleep, steps, VO2 max and more from Apple Health on its own. Nothing to log twice.

• See it side by side. What you did, how you felt and what your body did, on one timeline.

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WHAT YOU SEE

• Your body since a change started: each signal against the weeks before it, words first ("lower than your usual", "in your usual range"), the number second.

• Resting heart rate leads: it is the clearest signal a watch gives. HRV is shown as context and never judged.

• Streaks and habit strength: a forgiving strength ring that rewards keeping at it, not being perfect.

• Close your day: an optional 30-second check-in. Rate the day, add a note, and look back at how your weeks felt in the Journal.

• Since you started: one look back at a change. The days you kept it, how you felt, what your body did.

• Honest answers: no number without your own baseline, no judgement before there are enough days, and "nothing clear" when that is the truth.

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WHY TERVY

• No readiness score. No combined number telling you how you are. Just your own normal.

• It celebrates what you did, never your biology.

• No guilt. A rough day is a day: say so, and your streak stays.

• The watch you already own is enough. Works with any Apple Watch that records to Apple Health. No strap, no membership.

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