Oropen: Language Learning

Oropen is a powerful flashcard app for language learners, with a growing set of tools connected to your cards. The flashcards are free, unlimited and ad-free, and every review is scheduled by FSRS, the open-source spaced-repetition algorithm. The dictionary, reading assistant, AI speaking teacher and games all work from the same cards: what you look up becomes a card, and what you review comes back in lessons and games.

📚 POWERFUL FLASHCARDS, FREE & UNLIMITED

Unlimited decks and cards with a rich-text editor, images from your camera or gallery, and audio you record or upload. Five review presets per deck, from relaxed to intensive, with advanced settings for power users. Edit and review offline — the schedule runs on your device.

🧠 ADAPTIVE REVIEW WITH FSRS

Oropen analyzes your review history and schedules each card just before you would forget it, so you spend less time on words you already know and more on the difficult ones. The same scheduler runs on the web and in the app, so a card reviewed on one keeps its schedule on the other.

📥 IMPORT FROM ANKI, CSV & EXCEL

Bring your decks along: import from Anki, CSV and Excel, or photograph handwritten or printed notes and let the note scanner pull the vocabulary out for you. Export your collection with its full review history whenever you like.

☁️ YOUR DATA IN YOUR OWN GOOGLE DRIVE

Sync and back up your cards, media, review history and progress through your own Google Drive account — never Oropen's servers. Free for every account (currently in beta).

📖 READING ASSISTANT

Paste, type or scan any text. Translate it, see each word's meaning and role in context, pull out the vocabulary at your level and save words to your decks without leaving the text.

🔎 AI DICTIONARY

Meanings by frequency, word forms, prepositions and examples, with pronunciation. It knows which words you already have, and one tap turns a lookup into a card.

✏️ AI WRITING COACH

Write sentences or full texts and get instant, color-coded corrections that explain themselves, CEFR scores across six dimensions, and statistics of your progress over time.

🎧 LISTENING & GRAMMAR TESTS

Build your own listening exams — level, topic, audio length and number of speakers are yours to set — and grammar tests on any topic. Take them under exam conditions and get an explanation for every answer.

🗣️ AI SPEAKING TEACHER

Hands-free conversation courses with an AI teacher who plans lessons around the vocabulary you actually reviewed, corrects you as you talk, and has an exam-preparation mode.

🎬 VIDEO SUBTITLES

Open a video you own and get timed subtitles written from its soundtrack. Tap a word to look it up and turn it into a card.

🎮 WORD GAMES

Match, Word Rain and Memory, played with your own cards. Playing counts as reviewing: results feed the FSRS schedule.

📊 LEARNING STATISTICS

Streaks, study time, marks and progress across every tool, computed on your device.

🎨 AI IMAGES & PRONUNCIATION

Generate images for your cards and natural text-to-speech audio in a choice of voices. Like the other AI tools, these run on AI Units, bought as a monthly or one-time package. The flashcards themselves never need them.

🔐 PRIVACY FIRST

Your learning data lives on your device and in your own Drive. Oropen shows no ads, does not sell your personal data, and is operated from Germany under the GDPR.

✨ MORE FEATURES

- Unlimited decks, cards and reviews at no cost
- Offline editing and reviewing
- Light and dark themes
- Built-in camera for card images and note scanning
- Sign in with email, Google or Apple, with two-factor authentication
- Free to get started — no credit card required

🌍 LEARN THE LANGUAGE YOU CHOOSE

Study English, German or Persian today, with French, Spanish, Italian, Portuguese, Dutch, Japanese and Korean coming next. Oropen adapts to your level and goals.

Powerful flashcards at the heart of your language learning — with the tools around them.