Quit Smoking Cold Turkey: 336

336 hours. The acute phase of quitting nicotine, mapped hour by hour.

336 is a cold turkey quit smoking and quit vaping app built on clinical science, not motivational fluff. Every hour of your 14-day nicotine detox is mapped with real pharmacological data: what nicotine is doing in your body, what withdrawal symptoms to expect, and when they peak and fade.

Cold turkey. Nicotine-free. Works alongside NRT or medication if you use it.

This app is for people who are done. You quit smoking or vaping once, cold turkey, and 336 tracks your body's recovery hour by hour.

Quit vaping or quit smoking — the same 336 hours

Whether you want to stop vaping a disposable or an e-cigarette, stop smoking cigarettes, or quit nicotine pouches, it is the same drug leaving the same body on the same curve. 336 asks what you are quitting during setup and tunes every briefing to it. If you only vape, it talks about your vape, not cigarettes; if you stop smoking, it also tracks carbon monoxide leaving your blood.

How it works

• Tap "I Quit Now" and your 336-hour countdown begins
• Each hour shows clinical data: nicotine blood levels, carbon monoxide clearance, receptor recovery, and neurotransmitter normalization
• Watch nicotine and cotinine clear from your bloodstream in real time
• A quit smoking tracker that follows you through 4 distinct phases of nicotine withdrawal and recovery
• The Battle Map gives you a bird's-eye view of all 14 days — see how far you've come and what's ahead

The four phases

Phase 1 — Acute Withdrawal (Hours 1-72). The peak. Nicotine leaves your blood within 48 hours. Carbon monoxide clears in 24. These are the hardest hours of the sprint, and 336 walks you through every one.

Phase 2 — The Drop (Days 4-7). Cravings fall sharply and become cue-driven rather than chemical. Lung cilia begin regenerating. Circulation improves measurably.

Phase 3 — Turning Point (Days 8-10). Cravings are rare and brief now, and most last under 3 minutes. Your brain is rewiring.

Phase 4 — Consolidation (Days 11-14). Nicotinic receptors downregulate toward baseline. The acute physical withdrawal is behind you.

SOS breathing

When a craving hits, the SOS button launches a 60-second guided breathing exercise based on paced-breathing research. No articles to read, no community posts — just breathe. It works offline and it is never behind a paywall.

AFTER HOURS

Fourteen original audio stories, one unlocking each day, written for the hours when the craving is boredom rather than chemistry. Ten languages, each with its own fourteen — not translations of one another. They download only if you want them.

Built for quitters

• Supports vaping, e-cigarettes, disposables, cigarettes, pouches, and other nicotine products
• 336 hourly clinical updates
• Smart notifications that match your current withdrawal phase
• OLED-black interface designed for midnight cravings
• Available in 20 languages
• No account required — your quit date stays on your device
• Free for your first hour. One purchase then unlocks all 336 hours, every briefing and unlimited restarts — forever. No subscriptions, ever.

336 is a cessation aid. It is not a medical device. It does not sell, promote, or glorify tobacco or nicotine products. If you have a medical condition or are pregnant, consult a healthcare professional before attempting cessation.

Privacy: https://quit336.com/privacy
Terms: https://quit336.com/terms
Support: https://quit336.com/support

Recent changes:
• Redesigned screens: one tab bar, the briefing player under the hour's title, and a Battle Map that opens on the whole sprint
• 336 asks what you are quitting before the clock starts; vapers no longer see cigarette text
• Nicotine is below test detection by hour 16; the 10 ng/mL cotinine cut-off is shown apart from full clearance
• Without the unlock, notifications after the first hour are milestones only
• Plurals, time, dates and numbers fixed in all 20 languages