Terms and Conditions
Terms and Conditions
Last updated: May 7, 2026
These Terms and Conditions ("Terms") govern your use of the Puff Lung mobile application (the "App"), provided by Cardboard LLC ("Cardboard," "we," "us," or "our"). By downloading, installing, or using the App, you agree to be bound by these Terms. If you do not agree, do not use the App.
1. Eligibility
You must be at least eighteen (18) years old, or the legal age of majority in your jurisdiction, to use the App. The App addresses behavior surrounding nicotine, tobacco, and vaping products, and is intended only for individuals legally permitted to purchase and use such products in their location. By using the App, you represent and warrant that you meet this requirement.
2. Description of the Service
The App allows users to log vape or nicotine consumption, set daily goals, view a stylized lung-health visualization, run optional "detox" sessions, and view a home screen widget. Certain features are gated behind a paid subscription. The App is for self-tracking and motivational purposes only and is not a medical device or treatment.
3. Health Disclaimer
THE APP DOES NOT PROVIDE MEDICAL ADVICE. The lung visualizations, health numbers, decay stages, detox bonuses, and any related metrics are stylized representations meant to motivate behavior change. They are not a clinical assessment of your actual lung health, addiction status, or wellbeing. Always seek the advice of a qualified healthcare provider for any questions you may have regarding nicotine, tobacco, vaping, or your physical or mental health. Never disregard or delay professional medical advice because of something shown in the App.
4. Subscriptions
Auto-renewing subscriptions
The App offers auto-renewing subscriptions ("Puff Lung Unlimited"), available as weekly or monthly options. Pricing is displayed in the App at the time of purchase and is set by Apple in your local currency.
Billing
Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews at the end of each billing period unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the cost of the chosen subscription.
Free trials
If a free trial or introductory offer is available, the trial period begins on the date of purchase and ends after the disclosed period. If you do not cancel before the trial ends, the subscription will auto-renew at the standard price.
Managing or canceling
You can manage subscriptions and turn off auto-renewal in your device's Settings → [Apple ID] → Subscriptions. Deleting the App does not cancel your subscription. No refunds are provided for partial subscription periods, except where required by applicable law.
Third-party services
Subscription processing is handled by Apple and verified by RevenueCat, Inc. By purchasing a subscription, you also agree to Apple's and acknowledge RevenueCat's role in subscription verification.
5. License
Subject to your compliance with these Terms, Cardboard grants you a limited, non-exclusive, non-transferable, revocable license to install and use the App for your personal, non-commercial use on a device you own or control, in accordance with Apple's App Store Terms.
6. Restrictions
You agree that you will not, directly or indirectly:
Reverse engineer, decompile, disassemble, or attempt to derive source code from the App, except as expressly permitted by applicable law
Modify, adapt, or create derivative works of the App
Resell, rent, lease, sublicense, or otherwise commercially exploit the App
Remove, alter, or obscure any proprietary notices
Use the App in any way that violates applicable law or these Terms
Use the App to encourage or promote tobacco, vape, or nicotine sales to minors
Submit fraudulent, falsified, or automated data to the App
7. Intellectual Property
The App, including all software, designs, illustrations, characters, copy, and trademarks, is the exclusive property of Cardboard LLC and its licensors and is protected by copyright, trademark, and other intellectual property laws. Nothing in these Terms transfers any rights to you except the limited license described in Section 5.
8. User Content
The App does not currently allow you to submit content to other users or to publicly post content. Information you enter (counts, goals, costs) is stored on your device and used to operate the App. You retain ownership of your inputs.
9. Disclaimer of Warranties
THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND ACCURACY. CARDBOARD DOES NOT WARRANT THAT THE APP WILL BE UNINTERRUPTED, ERROR-FREE, OR FREE OF HARMFUL COMPONENTS, OR THAT IT WILL CAUSE OR ASSIST IN REDUCING NICOTINE OR TOBACCO USE.
10. Limitation of Liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW, IN NO EVENT WILL CARDBOARD, ITS AFFILIATES, OFFICERS, EMPLOYEES, OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS, REVENUE, DATA, GOODWILL, OR OTHER INTANGIBLE LOSSES, ARISING OUT OF OR RELATED TO YOUR USE OF (OR INABILITY TO USE) THE APP — EVEN IF CARDBOARD HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
CARDBOARD'S TOTAL CUMULATIVE LIABILITY UNDER THESE TERMS WILL NOT EXCEED THE GREATER OF (A) THE AMOUNT YOU PAID US IN THE TWELVE (12) MONTHS BEFORE THE CLAIM AROSE, OR (B) ONE HUNDRED U.S. DOLLARS ($100). SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF CERTAIN DAMAGES, SO PORTIONS OF THIS SECTION MAY NOT APPLY TO YOU.
11. Indemnification
You agree to defend, indemnify, and hold harmless Cardboard LLC, its affiliates, and their respective officers, employees, and agents from any claim, demand, damages, or expense (including reasonable attorneys' fees) arising out of (a) your use of the App, (b) your violation of these Terms, or (c) your violation of any rights of another.
12. Termination
We may suspend or terminate your access to the App at any time for any reason, including violation of these Terms. You may stop using the App at any time. Upon termination, the license granted in Section 5 will end. Sections 3, 7, 9, 10, 11, 13, and 14 survive termination.
13. Governing Law and Disputes
These Terms are governed by the laws of the State of Maryland, without regard to conflict of law principles. Any dispute arising from these Terms or the App shall be resolved exclusively in the state or federal courts located in Anne Arundel County, Maryland, and you consent to the personal jurisdiction of those courts. You and Cardboard waive any right to a jury trial. Where mandatory consumer protection laws apply to you, this section does not limit your rights under those laws.
14. Apple-Specific Terms
You acknowledge that these Terms are between you and Cardboard, not Apple, and that Apple is not responsible for the App or its content. To the extent these Terms provide for usage rules of the App that are less restrictive than the App Store Terms, the App Store Terms control. Apple is a third-party beneficiary of these Terms and may enforce them.
In the event of any failure of the App to conform to any applicable warranty, you may notify Apple, who will refund the purchase price (if any) for the App. To the maximum extent permitted by law, Apple has no other warranty obligation with respect to the App.
15. Changes to These Terms
We may modify these Terms from time to time. The "Last updated" date at the top reflects the most recent revision. Material changes will be communicated through an in-app notice or App Store update notes. Continued use of the App after changes take effect constitutes acceptance of the revised Terms.
16. Entire Agreement
These Terms, together with the Privacy Policy, constitute the entire agreement between you and Cardboard regarding the App and supersede any prior agreements. If any provision is held unenforceable, the remaining provisions remain in effect.
17. Contact
Cardboard LLC
Email: dillon@cardboardllc.net
Mailing address: 148 Arundel Beach Road, Severna Park, MD