Turn every text
into a lesson.

Finally, a language learning system that fits in your pocket. Designed with productivity, relevancy, and efficiency in mind.

Download Free for iOS
9:41
Messages
wait... your texts are showing up in Spanish? 👀
bro what keyboard is this
I need this immediately
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ParaLang

How It Works

Speak like yourself,
not a textbook.

Most apps teach you a generic dialect. ParaLang teaches you your dialect. By mastering the phrases you actually use, you retain your personality, your humor, and your professional edge in a second language.

Step 1

Act naturally

Text friends, send emails, or search the web using the ParaLang English keyboard.

Step 2

Instant Translation

Real-time, on-device translation sent straight to your chat for constant exposure to your target language.

Step 3

Our Engine

The app locally filters and harvests your own phrases and turns them into a custom curriculum that's highly relevant to your life.

Step 4

Daily Mastery

Your life context awaits you in the app as scientifically-scheduled spaced-repetition flashcards.

The Science

Engineered for
maximum retention.
Powered by FSRS.

ParaLang is built on the Free Spaced Repetition Scheduler (FSRS)—a mathematically optimized algorithm trusted by professionals to maximize how much you learn and minimize how much you forget. Our engine tracks your memory decay. The more you get a phrase right, the longer the interval until you see it again. Struggle with a word? We'll show it more often to strengthen your recall.

retention_model.fsrs
100% 60% 20% Day 1 Day 4 Day 10

Forgetting curve with FSRS quiz triggers ●

Traditional Systems

Review backlogs grow unchecked. You feel buried. You stop.

Smart-Buffer Optimization

ParaLang uses dynamic deck optimization to keep your review load light, focusing only on words that matter to your current conversations.

Quiz Modes

Contextual Fill-in-the-Blanks, Listening, Speaking, and targeted vocabulary flashcards, scheduled to maximize long-term retention.

ParaLang Pro

See your fluency
materialize, ad-free.

Get deep insights into your Linguistic Growth. Watch as your personal phrases migrate from 'New' to 'Mastered' through a scientifically calibrated pipeline.

Mastery Matrix

Last 14 days
Flashcards Context Fill Speaking

Free forever. Pro for the obsessed.

The core translation engine is 100% free. Pro unlocks true offline capabilities with ad-free quizzes, and advanced learning analytics.

Get Pro
🐧

Privacy Shield

Zero tracking.
Zero cloud.
Zero AI.
Zero data sold.
Zero accounts.
Your keystrokes never leave your device.

Keyboards that track your typing are creepy. We built our system for complete privacy.

No Account Required

Just download and start typing. We don't even know your name. No email, no password, no data.

100% On-Device

Apple's Neural Engine handles all translations offline. Disable Wi-Fi entirely for complete peace of mind.

The Relevancy Filter

The Linguistic Shield ensures your learning engine only sees language you want to master. Names, numbers, and passwords never leave your secure enclave.

NPA Ads (Free Users)

Free users see ads, but we strictly enforce Non-Personalized Ads. Google is blocked from using your IDFA or data to track you across apps.

Read our full Privacy Policy →

Seven Languages. Zero Language Paywalls.

🇪🇸Spanish · 🇫🇷French · 🇩🇪German · 🇮🇹Italian · 🇵🇹Portuguese · 🇯🇵Japanese · 🇷🇺Russian ·