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Privacy policy

Last updated: April 25, 2026

natallie is built on a simple principle: your data belongs to you, stays on your device, and is never transmitted to anyone, including us.

What information natallie processes

When you use natallie, the following data is created and stored locally on your device only:

• Buttons and boards you set up (names, colors, configurations)
• Tap events you log (timestamps and which buttons were tapped)
• Notes you write (text and timestamps)
• Optional PIN codes you set for boards or app access
• Your language preference and app name

This information is stored using your browser's standard local storage mechanism. It is not sent over the internet. We have no way to access, view, modify, or recover this data.

What we do not do

• We do not operate any server that stores your data.
• We do not require account creation or any form of login.
• We do not collect personally identifying information (name, email, location, IP address, device identifiers).
• We do not use analytics services (no Google Analytics, Mixpanel, Amplitude, Segment, or similar).
• We do not use advertising networks or tracking pixels.
• We do not share, sell, rent, or transfer your data to any third party.
• We do not use cookies for tracking. (The app uses local browser storage to function, but this is not a cookie and is not transmitted to any server.)

Data export and backup

natallie includes features that let you export your own data as CSV or backup files. When you use these features, the data is generated on your device and downloaded to your device. We do not see, copy, or process the exported files.

If you choose to share an exported file with someone else (for example, by emailing it to a researcher or therapist), that sharing is your action and is governed by the privacy policy of whatever service you use to share it.

Service worker and offline use

natallie uses a service worker to enable offline functionality. The service worker caches the app's code (HTML, CSS, JavaScript) on your device so the app loads quickly and works without an internet connection. The service worker does not transmit your data anywhere.

Hosting

The natallie app code (the website itself) is hosted on Vercel, a static hosting service. When you load natallie.app in your browser, Vercel may receive standard server logs that any web host receives. These logs typically include IP address, browser type, and the page requested. They are managed by Vercel under their own privacy policy and are not used by us for any purpose. We do not access, analyze, or retain these logs.

Vercel's privacy policy is available at vercel.com/legal/privacy-policy.

Children's privacy

natallie is suitable for users of all ages and does not collect any personal information from anyone, including children. Because the app does not collect or transmit data, there are no special data handling concerns related to children's data.

Changes to this policy

If this policy ever changes, for example if natallie introduces an optional cloud sync feature in the future, we will update this page and revise the "Last updated" date at the top. Any change that introduces new data processing will require your explicit opt-in. Existing local-only behavior will not change without your action.

Your rights

Because we do not collect, store, or process your personal data, there is no data for us to delete, export, or correct on your behalf. Your data lives on your device. You can:

• Export your data at any time using the in-app backup feature.
• Delete your data at any time using the in-app reset function or by clearing your browser's storage for natallie.app.
• Use the app entirely offline if you prefer.

If you have questions about this policy or about how natallie works, you can contact us at the email below.

Contact

natallie is a sole proprietorship operated by Hannah Hiratsuka, based in Tokyo, Japan.

For questions about this privacy policy, email info@natallie.app.