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ReGen
Private beta

Quit.
Watch your body regen.

ReGen tracks quitting nicotine, alcohol, cannabis, caffeine and sugar, and shows you what is healing inside, organ by organ, day by day.

Free during beta. We only email you when there is a place for you. Privacy policy

How it works

Not a streak counter. A recovery map.

  1. Pick your habits and quit date

    One habit or several, starting now, tonight or next Monday. Add what you used to spend and watch the savings build.

  2. Watch milestones unlock

    From “Carbon monoxide back to normal” at 12 hours to “Heart disease risk halves” at 1 year, each milestone lights up an organ on your body map.

  3. Slip? It is a dip, not a restart

    One cigarette after a month doesn't wipe a month. ReGen shows what it set back, and how soon you are back on track.

Your progress is kept, honestly.

In ReGen, short term milestones like carbon monoxide and nicotine restart from your last slip. Long term milestones only take a small dip. Repeated slips add up, a single one rarely does. The size of a dip is a working estimate, not a medical measurement.

Quit day Slip Back on track

What heals, and when

Your body starts the moment you stop.

Tobacco · 12 hours

Carbon monoxide back to normal

Blood oxygen recovers as carbon monoxide clears.

Source: WHO, CDC

Vaping · 3 days

Nicotine has left your body

Cravings and irritability often peak around here.

Source: CDC

Alcohol · 2 to 6 weeks

Fatty liver reverses

Fat starts clearing within days and can fully reverse in 2 to 6 weeks without alcohol.

Source: NHS

Cannabis · 2 days to 4 weeks

CB1 receptors back to normal

Brain cannabinoid receptors start recovering within 2 days and return to normal in about 4 weeks.

Source: Hirvonen J et al. (2012), Molecular Psychiatry

Everyone recovers at their own pace. Percentages show progress toward a milestone, not a medical measurement.

Privacy

Private by design.

Your quit data lives in your own account, stored in Europe. No ads, no tracking, no community feed unless you choose one later. No other user can see your slips.

Read the privacy policy

Health note

ReGen is not medical advice. If you drank heavily every day, stopping suddenly can cause dangerous withdrawal. Speak to a doctor before you quit.

Take damage. Regen.

ReGen is in private beta. Leave your email and we'll let you in as places open.

We only use your email to invite you. Privacy policy