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About SubjectCards: Learn Vietnamese

Type a sentence you wish you could say in Vietnamese. It comes back as a flashcard with native audio, and spaced repetition brings it back the day before you would have forgotten it. SubjectCards is for adults learning a language for a reason: a trip, a partner's family, a job in a new city, a grandmother who never learned English. Nothing here is a game. There are no points, and nothing asks you to protect a streak. There is a card with a voice saying it properly, and a schedule that knows when you need to see it again. YOUR OWN PHRASES, IN A LOCAL'S WORDS Type what you want to say in English. Up to three ways a local would put it come back. Each carries a short hint about who to say it to. The form you use with a shopkeeper differs from the one you use with a friend. Already know the words? Type them in the language and they come back as your card with the marks in place. Ask for something more casual or more respectful and the card changes. Pick one and the press makes it a card: Vietnamese on the front with a play control, pronunciation and English on the back. Cards you make are stamped YOURS. The free plan includes three phrases of your own. Premium lifts that cap. HEAR EVERY CARD Every card has a play control on the front and the back. Audio plays when a card flips, so you hear the tones before you read the letters. Every card in the library plays for free, so you can listen before you add it. SPACED REPETITION THAT SHOWS ITS WORK Grade the card (Not yet, or I know it) and the SM-2 schedule decides when it returns. Today shows where each word stands, from new to learning to known, with how many come back tomorrow. Review ahead whenever you like. Studying is never locked behind the schedule. A LIBRARY YOU BUILD FROM Start with a curated core of 200 cards in nine categories, from greetings and food to directions and numbers. Add packs on top. Or make a subject of your own, name it for the trip or the person, and fill it from the library and your own phrases. MONTHS, PRESSED Practice on enough days in a month and you claim that month's seal, ink on paper. Miss a day and nothing breaks. FOUR LANGUAGES Vietnamese, Korean, Mandarin and Spanish, each with its own library and its own review queue. The first language is free. Premium opens all four. WORKS ON A PLANE Your cards and their audio live on the phone, and so does the schedule. Reviews sync when you are back online. No account is needed. Sign in with Apple or Google only if you want your progress on a second device. FREE AND PREMIUM Free: one language, a starter deck of about 25 cards built from your level and your goal, three phrases of your own, and a listen to every card in the library. Premium: the full library with every pack across all four languages, and phrases of your own beyond the three-card cap. SubjectCards Premium is $6.99 per month or $39.99 per year. The annual plan starts with a 7-day free trial. Payment is charged to your Apple ID account when you confirm the purchase. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription in your App Store account settings after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://subjectcards.com/terms Privacy Policy: https://subjectcards.com/privacy

What’s new

Version 1.0.2 · Updated September 10, 2026

Your phrase is now a conversation. Type it in English and up to three ways a local says it come back. Type words you already know in the language and they come back as your card with the marks in place. Also includes misc onboarding and product improvements.

App privacy

The developer, TrueStandard Labs LLC, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History
  • Contact Info: Email Address, Name, Other User Contact Info
  • Identifiers: User ID
  • Usage Data: Product Interaction, Other Usage Data

Used for: App Functionality

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