# Rhythm Word

Vocabulary learning that never repeats a sentence.

## What it is

Rhythm Word is an iOS vocabulary learning app (with a Chrome extension on desktop) for serious learners. Every review opens with a brand-new context sentence written for that learner, scheduled by FSRS-4.5 spaced repetition at the moment recall is about to fail.

## Get it

- App Store: https://apps.apple.com/app/rhythm-word/id6757683503
- Chrome Web Store: https://chromewebstore.google.com/detail/rhythm-word/nndhjoajdbfhkajinilgmakhigmnbgna

## Why it works

- Every sentence is unique. Sentences are generated per learner, never recycled.
- FSRS-4.5 spaced repetition with 90% target retention.
- Krashen i+1 calibration: difficulty floats with your level.
- Six review engines: card swipe, spelling, pronunciation, fill-in-the-blank, matching, rapid fire.
- Eleven preset learning scenarios plus custom scenarios.
- Article generation, offline mode, iOS home-screen widget.

## Languages

- Target languages: English, Spanish, French, German, Japanese, Korean.
- UI languages: English, Simplified Chinese, Traditional Chinese, Spanish, Portuguese (BR), French, German, Japanese, Korean, Vietnamese, Turkish.

## Pricing

- 7-day free trial — full access.
- After the trial: quarterly or annual subscription, billed by the App Store.
- Local-currency pricing is set by Apple for your region. See the App Store listing for your exact price.
- Machine-readable manifest: https://rhythmword.com/pricing.md

## Audience

Test-prep candidates (TOEFL, IELTS, GRE, SAT, GMAT), university students, business English learners, heritage / immigrant learners, self-directed language learners.

## Constraints

- iOS only on mobile. No native Android app.
- No public API, no SDK, no MCP server. Consumer app only.
- Account creation only via Apple ID through the App Store.

## Pages

- Home: https://rhythmword.com/
- About: https://rhythmword.com/about
- Pricing: https://rhythmword.com/pricing
- Blog: https://rhythmword.com/blog
- Support: https://rhythmword.com/support
- Privacy: https://rhythmword.com/privacy

## For AI agents

- Short summary: https://rhythmword.com/llms.txt
- Full documentation (single file): https://rhythmword.com/llms-full.txt
- Pricing manifest: https://rhythmword.com/pricing.md
- Blog index: https://rhythmword.com/blog/llms.txt
- AI plugin descriptor: https://rhythmword.com/.well-known/ai-plugin.json
- A2A agent card: https://rhythmword.com/.well-known/agent-card.json

## Contact

- Support: support@rhythmword.com
- Feedback: feedback@rhythmword.com
- Founder: White (white@rhythmword.com)