Learn words by listening, not just reading

Register the words you want to learn. AI generates meanings, examples, and audio. Master vocabulary through background playback while commuting, walking, or anytime.

Coming Soon on iOS Learn more →

My Vocabulary

ephemeral

adjective

lasting for a very short time

serendipity

noun

finding valuable things by chance

Apple Watch

AI generates content

Learn by Sound

Continuous Play

Background Play

Bookmarks

Focus Training

Learn by Sound Continuous Play Background Play Bookmarks Focus Training Apple Watch AI Content

Features

Built for serious learners

Every feature is designed to help you absorb vocabulary through listening, seamlessly integrated into your daily life.

AI-Powered Content

Just register a word. AI instantly generates accurate definitions, contextual example sentences, and natural pronunciation audio.

Background Playback

Learn while commuting, exercising, or doing chores. Continuous audio playback works even when your phone is locked.

Smart Filtering

Exclude words you've already mastered. Focus your listening time on vocabulary that still needs reinforcement.

Apple Watch Sync

See the currently playing word on your wrist. Quick glance learning without pulling out your phone.

Multiple Languages

Learn English or German vocabulary with support for 10 native languages. More language pairs coming soon.

Your Vocabulary

No pre-made word lists. Register only the words you encounter in your studies—the ones you actually need to learn.

How It Works

Simple, focused workflow

Register a word

Type any word you want to learn

AI generates

Meaning, examples, and audio created

Listen anywhere

Background playback while you live

Remember

Mark mastered words to filter them out

Pricing

Simple, transparent pricing

One plan. Everything included. No hidden fees.

Monthly Subscription

Full Access

$ 7 /month

Also available: €7 / ¥700

Register up to 30 words per day
AI-generated definitions & examples
Natural pronunciation audio
Background & continuous playback
Apple Watch companion app
Learn English or German

Coming Soon

FAQ

Common questions

Why no pre-made word lists?

Every learner encounters different vocabulary in their studies. The words you struggle with are personal—only you know which ones you need to memorize. sonocarta helps you capture and learn those specific words.

What languages are supported?

Currently, you can learn English or German vocabulary. Your native language can be Japanese, English, Korean, Chinese (Simplified/Traditional), German, French, Spanish, Turkish, or Portuguese.

Why 30 words per day?

Quality over quantity. 30 new words daily is substantial for serious retention. This limit encourages you to be intentional about which words you add, focusing on vocabulary that matters most to you.

Is there a free trial?

You can download the app and explore its features. The subscription unlocks AI word generation and all learning features.

Why no progress tracking or notifications?

Language learning is a personal battle. We believe in your discipline. No gamification gimmicks—just a focused tool for people who are committed to learning.

Does it work offline?

Once words are generated, audio playback works offline. You need an internet connection to register new words and generate AI content.

A Note from the Developer

Creator of sonocarta

I'm a Japanese who started learning German. It's been incredibly challenging—memorizing vocabulary remains one of my biggest struggles to this day.

I built sonocarta to ease the burden of word memorization in my daily language study. It's a tool born from my own frustration and determination.

This app is for people who study seriously and independently. I don't include pre-made word lists because I believe learners naturally encounter words they need to memorize every day. I don't send notifications or visualize progress—language learning is a battle with yourself.

Let's study together.

— The sonocarta Developer