Not "a tricky answer" — no answer. USCIS prints "Answers will vary" or points at its own updates page, because the answer depends on where you live or on who holds office the day you are interviewed.
That is one question in sixteen. On a 20-question interview you will probably be asked one of them. Every other study app ships the same 128 flashcards and either prints the pointer as though it were the answer, or bundles a list of names that goes out of date at the next election.
Preamble helps you find each one once, records what you found and the date you confirmed it, and then drills you on your own answer along with the rest.
USCIS switched to the 2025 civics test — 128 questions, 20 asked, 12 correct to pass — for anyone who filed Form N-400 on or after 20 October 2025. Anyone who filed before that date still takes the 2008 test: 100 questions, 10 asked, 6 to pass. It is decided by your filing date, not by preference.
Preamble asks for your filing date and tells you which one applies to you. Both question lists are included in full.
Ask "What is the form of government of the United States?" and USCIS accepts Republic, Constitution-based federal republic or Representative democracy. Some questions have twenty-four acceptable answers. An app that shows you one teaches you that your own correct answer was wrong.
Preamble shows all of them, reproduced word for word from the USCIS list. A build check proves every one of the 918 question strings in the app appears verbatim in the government PDF it came from — if USCIS revises a document, the build fails rather than the content quietly going stale.
There are no multiple-choice buttons in this app. The real interview is an officer asking you a question and you answering out loud, and picking the right one of three options is a much easier task than recalling the answer cold. So Preamble shows the question, waits while you say it aloud, then reveals every accepted answer and asks you to mark yourself honestly.
The officer does not ask all 20 questions. USCIS stops the test the moment you reach 12 correct — or 9 wrong, when the pass mark is out of reach. Most real interviews are therefore much shorter than 20 questions. Preamble reproduces that exactly.
Reading and writing vocabulary, complete: the 64 words the reading sentences are built from and the 75 the writing sentences use. Nothing outside those lists can appear.
There is no account, no sign-in, no analytics, no advertising and no trackers. The app makes no network requests of its own — the only network activity is the App Store's, when you buy or restore. It works in airplane mode. Your answers live in one file on your device and deleting the app deletes them. The App Store privacy label says Data Not Collected because that is literally true.
This matters more than usual here. You are preparing a federal application; an advertising SDK inside that is a data-broker exposure, not a monetisation choice.
$14.99 once unlocks unlimited practice, unlimited mock interviews and the record of what you still get wrong. It is not a subscription, nothing auto-renews and there are no ads at any tier.
Reading all 128 questions and every accepted answer is free, permanently, and so is recording your own answers to the eight that have none. You should be able to open the USCIS PDF next to this app and check every word before you spend anything.
All content is reproduced from works of the United States Government, which are not subject to copyright under 17 U.S.C. § 105:
Preamble is not affiliated with, endorsed by, or approved by U.S. Citizenship and Immigration Services, the Department of Homeland Security, or any other government agency. It uses no government seal, logo or mark. It is study material only: it submits nothing to USCIS, tracks no case, and is not legal advice.