Napkin Math: Terms of Service & Privacy Policy

You must be at least 13 years old to use Napkin Math, or older if the law where you live requires it. If you are under 18, you may use the service only with the involvement of a parent or legal guardian.

Napkin Math is offered for your personal, non-commercial use. You agree to provide accurate account information and keep it current.

Napkin Math is a food journaling and reflection tool. It is not a doctor, dietitian, therapist, or medical device, and it does not provide medical advice, diagnosis, treatment, or emergency services.

Meal interpretations, trends, summaries, goals, reminders, and any AI-assisted outputs are informational only and may be incomplete or inaccurate. You should use your own judgment and consult a qualified professional before making health, nutrition, or treatment decisions. If professional advice conflicts with information from the service, follow the professional advice.

You are responsible for activity that occurs under your account and for maintaining the confidentiality of your login credentials. If you believe your account has been accessed without permission, contact us promptly at team@paperstar.cc.

If you choose to sign in with Apple or Google, your use of those sign-in tools is also subject to the applicable third-party terms and policies.

You keep ownership of the photos, food logs, notes, goals, voice inputs, profile information, and other content you submit to Napkin Math.

You grant Jessica Tang and Paper Star a non-exclusive, worldwide, royalty-free license to host, store, reproduce, transmit, display, format, modify, and otherwise process your content solely as needed to operate, secure, maintain, and improve the service. This includes displaying content according to your sharing settings and processing your inputs to provide AI-assisted features.

You represent that you have the rights needed to submit your content and that doing so does not violate the rights, privacy, or safety of any other person.

You agree not to:

• use the service for unlawful, abusive, fraudulent, or deceptive purposes;
• upload content you do not have the right to use or share;
• harass, shame, stalk, impersonate, or otherwise harm other users;
• reverse engineer, scrape, probe, or automate access to the service without permission;
• interfere with the operation, security, or stability of the service;
• use the service or its content to build competing products, datasets, or models.

Napkin Math includes optional social features such as friends, leagues, feeds, and quizzes. If you choose to use those features, content you share may be visible to other users based on your settings and the feature you use.

You are responsible for what you choose to share and for choosing the audience for that content. Use care when posting photos, captions, reactions, or other information that could reveal personal details.

The service relies on third-party providers for features such as hosting, storage, authentication, push notifications, analytics, and AI-assisted processing. Those providers may have their own terms and policies that also apply to your use of their services.

Certain features may request access to your camera, photo library, microphone, speech recognition, notifications, or location. You can choose whether to grant these permissions, but some features may not work without them.

The service, including its software, design, branding, text, graphics, and other content other than your content, is owned by Jessica Tang and Paper Star or its licensors and is protected by applicable intellectual property laws.

Subject to these terms, we grant you a limited, revocable, non-transferable, non-exclusive license to use the service for personal use. If you send feedback or suggestions, we may use them without restriction or compensation to you.

You may stop using the service at any time and may delete your account using the in-app flow or the instructions on the Delete Account or Data page.

We may suspend or terminate access to the service if we reasonably believe you violated these terms, created risk for other users or the service, or if suspension is required for legal, security, or operational reasons.

The service is provided on an "as is" and "as available" basis. To the fullest extent permitted by law, we disclaim warranties of any kind, including warranties of accuracy, availability, non-infringement, merchantability, and fitness for a particular purpose.

To the fullest extent permitted by law, Jessica Tang and Paper Star and its service providers will not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of data, goodwill, profits, or health related outcomes arising from or related to your use of the service. You are responsible for the decisions you make based on your logs, reflections, and any AI-assisted outputs.

We may update these terms from time to time. If we make material changes, we may post the updated version in the app or on the website and update the "Last updated" date above.

If you continue using the service after changes take effect, you accept the revised terms. If you do not agree, stop using the service.

Questions about these terms can be sent to team@paperstar.cc.

Depending on how you use Napkin Math, we may collect:

• Account and profile information, such as your email address, display name, sign-in provider information, profile photo, preferences, and settings.
• Food journal and wellness information, such as meal entries, photos, descriptions, corrections, goals, reminders, notes, and information you choose to log about how you feel.
• Voice and media inputs, such as photos you upload, voice input you submit, and transcripts or extracted information used to create entries or suggestions.
• Social activity, such as your friends, reactions, shared posts, league activity, quiz activity, and other content you choose to make visible to others.
• Device, usage, and diagnostic information, such as app version, device type, operating system, timestamps, crash logs, performance data, and feature usage information.
• Support communications, such as emails and messages you send us.

Some information you choose to provide may relate to your health, nutrition, symptoms, or routines. You control what you add to the service.

If you grant permission, Napkin Math may access your camera, photo library, microphone, speech recognition, notifications, or location to provide app features.

If you sign in through Apple or Google, we receive the information those providers make available to us, such as your email address and basic profile details, subject to your settings with those providers.

We use information we collect to:

• create and manage your account;
• store and sync your logs, profile, and settings;
• process photos, text, and voice input to power meal logging, pattern detection, reflections, suggestions, and goal-related features;
• provide reminders, widgets, streaks, and other personalized app features;
• enable social features based on your settings;
• respond to support requests and service messages;
• monitor, debug, secure, and improve the performance and reliability of the service;
• comply with legal obligations and enforce our terms.

We may disclose information in the following circumstances:

• Service providers. We work with vendors that support hosting, storage, authentication, notifications, analytics, customer support, and AI-assisted functionality.
• Other users. If you use social features, information you choose to share may be visible to other users according to your settings and the feature involved.
• Legal and safety reasons. We may disclose information if reasonably necessary to comply with the law, respond to lawful requests, protect rights or safety, investigate misuse, or enforce our terms.
• Business transfers. Information may be transferred as part of a merger, acquisition, financing, reorganization, or sale of assets.
• With your direction. We may disclose information when you ask us to or clearly direct us to do so.

We do not sell your personal information. We may use aggregated or deidentified information to understand usage and improve the service.

Napkin Math includes features that process food photos, text, voice input, and related context to help generate meal entries, corrections, summaries, trends, and goal suggestions. Some of this processing may be handled by third-party service providers acting on our behalf.

Automated outputs can be wrong, incomplete, or misleading. Review entries and suggestions before relying on them, especially if you are making decisions related to your health or nutrition.

You can manage much of your information directly in the app by:

• editing your profile, logs, and goals;
• changing sharing and social settings;
• turning notifications on or off;
• changing device permissions in your phone settings;
• deleting your account through the in-app deletion flow.

Depending on where you live, you may also have rights to request access to, correction of, deletion of, or export of your personal information, or to object to or restrict certain processing. To make a request, contact team@paperstar.cc.

We keep information for as long as needed to provide the service, maintain account history and shared features, comply with legal obligations, resolve disputes, and protect the service.

If you delete your account, we will delete or deidentify your information within a reasonable period, except where retention is required for legal, security, fraud-prevention, backup, or recordkeeping purposes. Some residual copies may remain in backups for a limited time.

We use reasonable administrative, technical, and organizational safeguards designed to protect information under our control. However, no app, website, or storage system can be guaranteed to be completely secure.

Napkin Math is not intended for children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided personal information to us, contact us and we will investigate.

Your information may be processed and stored in the United States and other countries where we or our service providers operate. Those places may have different data protection laws than where you live.

We may update this Privacy Policy from time to time. If we make material changes, we may post the updated version in the app or on the website and update the "Last updated" date above.

Questions, privacy requests, or complaints can be sent to team@paperstar.cc.