
336: Quit Smoking & Vaping
Stop Smoking Cold Turkey
About
This app guides users through a 14-day cold turkey nicotine cessation program, providing hourly clinical data on the body's recovery. It offers a guided breathing exercise for cravings and tracks progress through four distinct withdrawal phases.
What's New in 336
1.2.1
November 2, 2026
• One purchase unlocks everything: every briefing, all 14 days, unlimited restarts. No subscription. If you paid before, you keep full access. • Without the unlock, notifications after the first hour are milestones only. • New layout: one tab bar at the bottom, and the briefing player directly under the hour's title. • The Battle Map opens on the whole sprint: 336 hours on a 14 × 24 grid. • SOS now breathes 4-7-8 (it ran 4-4-6), and Log a craving sits in SOS. • Before the clock starts, 336 asks what you are quitting: vaping, smoking or both. Vapers no longer see cigarette text. • Clearance figures made consistent: nicotine is below standard test detection by hour 16; the 10 ng/mL cotinine test cut-off is shown apart from full clearance at about hour 125. • Plurals, clock format, dates and numbers corrected in all 20 languages.
MoreSubscriptions & In-App Purchases
$9.99
336 Full Access
One payment. Yours forever. No subscription.
Developer apps
FAQ
How does 336 help me quit smoking and vaping?
336 provides a 14-day cold turkey program that tracks your body's recovery hour by hour. It uses clinical data to show you what's happening internally as you detox from nicotine.
What kind of clinical data does 336 provide?
Each hour, 336 displays data on nicotine blood levels, CO clearance, receptor recovery, and neurotransmitter normalization, helping you understand the biological timeline of addiction.
Does 336 offer support for cravings?
Yes, 336 includes an SOS Breathing feature, a 60-second guided exercise clinically proven to reduce acute nicotine cravings when they arise.
What are the four phases of withdrawal in 336?
The app guides you through Acute Withdrawal (1-72 hours), Peak Symptoms (Days 4-7), Turning Point (Days 8-10), and Consolidation (Days 11-14), detailing your body's healing process in each.
Is 336 free to use?
336 is free for the first hour. A one-time purchase unlocks all 336 hours, all briefings, and unlimited restarts, with no subscriptions required.
Does 336 have ads?
No, 336 does not contain advertisements. The app is designed to be an ad-free experience to support your quit journey.
What devices does 336 support?
336 is available on iPhone and iPad, with an OLED-black interface designed for use at any time.
How often is 336 updated?
The latest version of 336 is 1.2.1, which was last updated on November 2, 2026. Updates aim to refine the user experience and clinical data presentation.









