Have a question? Here are answers to the most commonly asked questions.
What makes Rhythm Word different from flashcard apps?
Flashcards stop at recognition. Rhythm Word opens every review with a fresh sentence in real context, then ends the session by asking you to produce the word in speaking, writing, or scenario dialogue.
What is active vocabulary?
Passive vocabulary is what you recognize when you read or hear it. Active vocabulary is what comes out when you speak or write. Most study methods only grow the first one. Rhythm Word is built to move words from the first into the second.
How does the spaced-repetition engine work?
The algorithm predicts where you sit on the Ebbinghaus forgetting curve and surfaces a word just before it would fade, spacing reviews farther apart as mastery grows. This maximizes memory while minimizing study time.
Will I learn current slang and abbreviations?
Yes. The sentences draw from real-world sources like Twitter and Reddit so you meet the acronyms, memes, and cultural references people use today.
Do the sentences adjust to my level?
Absolutely. The system continuously gauges your performance and rewrites future sentences inside your personal growth zone, just as adaptive-learning research recommends.
Is my data private and secure?
All learning data are encrypted at rest, never sold, and processed under GDPR-aligned policies. Your progress stays yours.
Is Rhythm Word free?
Yes. You can learn words for free with no cap on how many you study and no countdown to a locked screen. A subscription unlocks the advanced features, and some features have usage limits on a free account.
What platforms are supported?
Every platform is covered: iOS on the App Store, Android on Google Play, and a web app that runs in any browser. Your progress stays in sync across all of them.