Last updated: May 12, 2026
By downloading or using 336 ('the App'), you agree to these Terms of Use. If you do not agree, do not use the App.
The App provides general information about nicotine withdrawal based on published clinical research. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. If you experience severe withdrawal symptoms, seek medical attention immediately.
The App is intended for personal, non-commercial use by individuals who wish to quit nicotine products. You agree not to misuse the App, reverse engineer it, or use it for any unlawful purpose.
The App offers two auto-renewing subscriptions that unlock the full 14-day clinical sprint, audio briefings beyond hour 72, and unlimited retries: a Weekly subscription at $9.99 USD per week and an Annual subscription at $99.99 USD per year. Local prices in your currency are shown in the App before purchase. Both tiers unlock identical functionality.
New subscribers to the Weekly tier receive a 3-day free trial. The trial begins immediately upon subscribing. You may cancel anytime during the trial in your App Store or Google Play account settings; if you do not cancel before the trial ends, your subscription will renew at $9.99 USD per week (or local equivalent). Any unused portion of the free trial is forfeited if you purchase a subscription to the same content before the trial ends. The Annual subscription does not include a free trial.
Subscriptions automatically renew at the end of each period unless auto-renew is turned off at least 24 hours before the end of the current period. Your App Store or Google Play account will be charged for renewal within 24 hours prior to the end of the current period at the price shown above (or the then-current price). Payment is charged to your App Store or Google Play account at confirmation of purchase.
You can manage your subscription and turn off auto-renewal at any time by going to your App Store account settings (Settings → [your name] → Subscriptions on iOS) or Google Play subscriptions page on Android. Apple and Google do not generally provide refunds for unused portions of a subscription period; refunds, if any, are at Apple's or Google's sole discretion. Existing one-time in-app purchases made before May 12, 2026 grant lifetime access and are honored at no further charge.
The App is provided 'as is' without warranties of any kind, express or implied. We do not guarantee that the App will be error-free, uninterrupted, or that it will achieve any particular health outcome. Quitting nicotine is a personal journey and results vary.
To the maximum extent permitted by law, the developers and publishers of 336 shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising from your use of or inability to use the App.
Your use of the App is also governed by our Privacy Policy. Your data is stored locally on your device and you are responsible for its security.
We may update these Terms at any time. Continued use of the App after changes constitutes acceptance of the revised Terms.
Questions about these terms? Reach us at support (at) quit336.com.