Watch your body heal, day by day

Two to four weeks for most of it. The systematic review of abstinence effects found withdrawal begins in the first one to two days, peaks in the first week, and total scores are back at or near pre-quit levels by two weeks — three to four at the outside. Cravings and increased appetite are the two that can run longer.

Six to twelve weeks, and unusually for this kind of claim, it has actually been measured in living human brains. Smokers scanned during abstinence still had elevated nicotinic receptor levels at one month; by six to twelve weeks they matched non-smokers. A smaller earlier study using a different tracer put it at around 21 days.

The evidence doesn't support cutting down as the easier path. The largest head-to-head randomised trial — 697 smokers, everyone getting nicotine replacement and behavioural support — found abrupt quitting beat a two-week taper at both four weeks (49% vs 39%) and six months (22% vs 16%). A Cochrane review of 22 studies found the two approaches equivalent. So: equivalent at best, worse in the biggest single trial. If you do reduce first, the evidence supports using fast-acting NRT or varenicline during the reduction phase.

Because that's where the biology is. Urges peak on days two to three, and a review of people quitting without help found most relapse happens within the first eight days. Roughly 3 to 5% of unaided quitters are still abstinent at six to twelve months — which is not a comment on anyone's character, it's an argument for using the tools that work.

A few minutes. Worth being straight with you: this specific number isn't well established in the research literature, and the official sources disagree — Ireland's HSE says three to five minutes, the NHS says up to fifteen. What is well established is the long arc: urges decline exponentially, about 13% of people still report strong ones at six months, and by twelve months essentially nobody does.

The evidence points the opposite way. A meta-analysis of 26 longitudinal studies found people who quit scored lower on anxiety, depression, stress and mixed anxiety-depression than people who kept smoking, and higher on positive affect and psychological quality of life. The effect sizes were comparable to antidepressant treatment, and just as large for people with psychiatric diagnoses. These are observational studies, so read it as a strong association rather than proof — but "smoking calms my nerves" does not survive contact with the data.

Both answers are in the literature and the distinction matters. Randomised trials give high-certainty evidence that nicotine vapes beat nicotine replacement therapy for quitting — about four extra quitters per hundred. But real-world data are less kind: daily vaping was associated with more than double the odds of abstinence, while non-daily vaping showed no benefit at all, and both patterns were linked to higher relapse risk among people who'd already made a month. Switching completely and consistently is what the evidence supports. Dabbling is where it turns unfavourable.

Yes — that's the point of it. You tell the app what you use and roughly how much, and it estimates your daily nicotine load from that rather than converting everything into imaginary cigarettes. Cigarettes, vapes, pouches, dip, cigars and gum are all first-class.

The app is free, and the free tier is a real quit tool — receptor-reset ring, daily briefs, check-ins, craving SOS, money saved, badges and slip logging all work without paying. The optional Breathe Free unlock is $9.99 once and adds the full body recovery timeline with organ gauges, an adaptive taper planner that reacts to your check-ins, the nicotine and cotinine clearance curves, four themes, unlimited history and a shareable recovery profile — and it removes ads for good. There is no subscription, which is the part worth comparing: the major quit apps in this category charge roughly that much every year.