Privacy Policy

Last updated: August 21, 2026

Operator

FormN400.org is operated by Huu Long Nguyen, an individual (sole proprietor) based in the State of Hawaii, United States, who is the liable operating entity for this website. Contact: [email protected].

What the app does NOT do

• No account required to use the app.
• No login or sign-in.
• No advertisements.
• No analytics or telemetry services.
• No usage tracking — not by us, not by third parties.
• No payment, in-app purchases, or subscriptions.
• No collection of personal data (name, email, address, date of birth, photos, contacts, location, identifiers, etc.).
• No third-party SDKs that collect data.

What stays on your device

Your study activity is processed entirely on your device:

• Quiz answers and scores are kept in app memory while you are using the app and are discarded when you close it.
• Optional choices such as your selected route, language, or U.S. state are kept only in memory for the current session.
• Interview-practice input (for example, a name or date you type into a sample-answer field) stays in memory for that session only and is never transmitted or saved.
• For your study activity there is no background sync, no cloud save, and no server upload.

The single exception will be the optional Case Status Helper we are adding, which will contact our backend only to perform a case lookup you request. It is described in its own section below.

Mobile app (iOS)

The iOS app N-400 Citizenship Test is covered by this same policy and collects no personal data. Two features of the app deserve their own explanation:

• Read aloud (audio). When you tap to hear a question or answer, the audio is generated on your device by the system speech engine using the voices already installed on it. No audio, and no text, is transmitted anywhere.
• Study reminders. The optional daily reminder is a local notification scheduled on your device only. There is no push service, no push token, no account, and no server involved. Turning the reminder off cancels it on the device.

The app makes no network requests of its own. All question data is bundled inside the app, so it works with no connection at all; the only time the network is used is when you tap a link, which opens in your own browser.

Case Status Helper (coming soon)

The site will offer an optional Case Status Helper that will let you check the status of a USCIS case. This feature is not yet available. When you use it, you will type a USCIS receipt number. Here is exactly how that number will be handled:

• The receipt number is sent inside the request body — never in the page address (URL) or a query string on this site — to our backend service at api.formn400.org.
• Our backend exists only to relay (proxy) the request to the official USCIS Case Status API and return the result to you. We keep credentials on the server so they are never exposed to your browser.
• To perform the lookup, your receipt number is transmitted onward to the official USCIS Case Status API, which is operated by USCIS under its own privacy practices.
• The receipt number is never logged, stored, cached, or retained by us. It exists in memory only for the brief moment needed to complete that one lookup, and is then discarded.
• We do not associate the receipt number with any identity, and we keep no record that a lookup occurred — no history, no database, no analytics.

The Case Status Helper will be provided for convenience only. It is not affiliated with, authorized, endorsed, or approved by USCIS or DHS. For official case information, always rely on your USCIS account at my.uscis.gov.

No sale or sharing of data

We do not sell user data for profit or for any other monetary transaction. We do not share de-identified, anonymized, or pseudonymized data with third parties for any reason without your active consent. Because we do not collect personal data in the first place, there is no user data available to sell, rent, trade, or share.

Data retention and deletion

We retain no user-entered data. Quiz answers, selections, and interview-practice input exist only in the browser session and are permanently gone when you close or refresh the page. Once the Case Status Helper is available, any receipt number you submit through it will exist only in transient server memory for that single request and will be gone as soon as the lookup completes. Because nothing is stored, there is nothing for you to request the deletion of — there is no profile, account, or record to delete.

The one form of data that does exist is the standard server access log generated by our hosting and delivery provider, Cloudflare, when any website is served. These are ordinary content-delivery-network (CDN) logs that typically include items such as an IP address, a timestamp, the requested path, the response status, and a browser user-agent string. They are generated and managed by Cloudflare as part of operating the service, are retained under Cloudflare's own standard log-retention practices, and are not linked by us to your identity or to any case lookup. We do not maintain our own separate application logs of user content, and we do not use these CDN logs for analytics, advertising, profiling, or tracking.

Third-party services

The site relies on a small number of infrastructure services. None of them receive personal data we collect (we collect none), and none are used for advertising or tracking:

• Cloudflare — hosts the website (Cloudflare Pages) and will run the Case Status Helper backend (Cloudflare Workers) once that feature launches. Cloudflare processes standard server access logs as described above.
• Google Fonts — the page loads display fonts from Google's font service, which may receive your IP address as part of delivering the font files, subject to Google's own privacy policy. No other information is sent.
• Web Speech API — the practice "speak" and read-aloud features use your browser's built-in speech capability. Depending on your browser and operating system, speech recognition or synthesis may be processed by your browser vendor's service; this is a function of your browser, not something we operate, and we receive none of that audio.
• USCIS Case Status API — once the Case Status Helper launches, will receive only a receipt number you submit through it, as described above, and only when you use that feature.

U.S. State Privacy Notice

Some U.S. states provide residents with privacy rights such as the right to access, delete, correct, or opt out of the sale or sharing of personal information.

N-400 Citizenship Test does not collect, sell, share, or retain personal information. Because the app does not collect personal data, we do not maintain a consumer profile or have personal information to access, delete, correct, or opt out of sale/share.

If you have a privacy question, contact [email protected].

Data breach notification

Because we do not collect or store personal data, there is no personal-data store that could be breached, and no collected records that could be exposed. If a security incident affects the service in any way, we will post a clear notice on this site. We hold no email addresses, phone numbers, or other contact details for users, so we cannot send individual notifications — site notice is the means available to us, and we will use it promptly.

Transfer of ownership

If ownership of this site is transferred, or if the project is discontinued, there is no collected user data to transfer, because none is collected or stored. Any successor operator would be required to honor a privacy policy at least as protective of users as this one.

External links

The Resources tab inside the app, and any other USCIS links on this site, open official USCIS pages in your device's default browser. We do not embed those pages or proxy any traffic. Once you tap an external link, the destination website's own privacy practices apply — see the USCIS site for their policy.

Children

The app is intended for adults preparing for the U.S. naturalization civics test. It does not knowingly collect any information from children.

Changes to this policy

If we make a material change to this policy, we will tell you. Because the site has no user accounts and we hold no contact information, we provide that notice prominently on the site itself at the point of change — for example, a visible notice on this page and on the app's start screen — rather than by email.

Each material change will be accompanied by a short, plain-language summary of what changed and why, so you do not have to compare full versions to understand it. The Last updated date above will reflect the new revision, and older versions remain available in the public repository history. We ask for your active agreement to material changes; simply continuing to use the site is not treated as acceptance of a changed policy.

Contact

For help with the app itself, see the Support page.

Important notices

Official resources

For the current civics test materials and verified answers to time-sensitive questions, see the official USCIS page:
https://www.uscis.gov/citizenship/testupdates