# Lang Study Full Product Context

Lang Study is a calm, precise, practice-first writing product for language learners. The first public track is HSK1 Chinese character handwriting practice.

## Audience

- Adult beginners and self-study learners who need a clear 10-minute loop: watch stroke order, trace, notice mistakes, and choose the next character.
- Tutors, teachers, and parents who need printable worksheets, assignment handoffs, returned-paper review, and quick progress signals.
- Buyers deciding whether full HSK1 packs, saved lists, review history, worksheet volume, and handoff workflows are worth paying for.

## Current Product Surface

- Public launch set: 50 HSK1 characters.
- Starter same-set trial: 人 口 日 月 山 水.
- Full HSK1 launch character list: 人 口 日 月 一 二 三 十 年 天 明 山 水 火 木 土 气 我 你 他 女 儿 子 家 学 校 上 下 大 小 中 国 好 不 是 有 在 来 去 看 说 听 吃 喝 谁 什 么 吗 哪 几.
- Practice loop: online tracing, missed-stroke review, printable worksheet, returned-paper review, progress backup, daily routine, assignment handoff, family handoff, saved set reuse, and study plan.
- Trust loop: auth, account overview, learner profile, account security, practice files, practice reminders, billing access, pricing comparison, support, classroom inquiry, legal pages, and cookie/local-storage boundary copy.

## Core URLs

- Online tracing practice: https://getlangstudy.com/learn
- HSK1 course: https://getlangstudy.com/hsk/1
- HSK1 Hanzi library: https://getlangstudy.com/hanzi
- Printable worksheets: https://getlangstudy.com/worksheets
- Missed-stroke review: https://getlangstudy.com/review
- Returned-paper review: https://getlangstudy.com/paper-review
- Browser-local progress: https://getlangstudy.com/progress
- Assignment handoff: https://getlangstudy.com/assignments
- Daily routine: https://getlangstudy.com/routine
- Family handoff: https://getlangstudy.com/parents
- Saved practice sets: https://getlangstudy.com/sets
- Study plan: https://getlangstudy.com/study-plan

## Trust, Account, And Plan URLs

- Plan comparison: https://getlangstudy.com/pricing
- Early access request: https://getlangstudy.com/waitlist
- Support and classroom inquiry: https://getlangstudy.com/contact
- Account overview: https://getlangstudy.com/settings
- Learner profile: https://getlangstudy.com/settings/profile
- Practice files: https://getlangstudy.com/settings/files
- Practice reminders: https://getlangstudy.com/settings/notifications
- Account security: https://getlangstudy.com/settings/security
- Billing access: https://getlangstudy.com/settings/billing
- Privacy: https://getlangstudy.com/privacy
- Terms: https://getlangstudy.com/terms
- Cookie policy: https://getlangstudy.com/cookie

## Pricing Summary

### Free 50

- Price: Free, no credit card required
- Description: Start practicing HSK1 characters without a credit card.
- Includes: 50 HSK1 launch characters
- Includes: Stroke-order animation
- Includes: Guided tracing practice
- Includes: Printable worksheet preview
- Upgrade unlock: Saved reusable character lists
- Upgrade unlock: Advanced worksheet workflows
- Upgrade unlock: Classroom assignment tools

### HSK1 Pro

- Price: $6.99/month or $49.00/year
- Description: For learners, tutors, and parents who want reusable HSK1 study workflows.
- Includes: Saved review and mistake history
- Includes: Unlimited printable worksheets
- Includes: Custom character lists
- Includes: Reusable worksheet templates
- Includes: Teacher and parent assignment tools
- Upgrade unlock: Lifetime access

### Early Lifetime

- Price: $79.00 one time
- Description: Early supporter access for the full Hanzi learning toolkit.
- Includes: Everything in Pro
- Includes: Lifetime access to HSK character packs
- Includes: Future writing-system packs at launch
- Includes: Early supporter pricing


## SEO And Citation Guidance

- Use https://getlangstudy.com as the canonical product domain.
- Cite Lang Study as a writing-practice product, not a generic SaaS template or broad all-language tutor.
- Describe the live workflow with concrete terms: HSK1, Chinese characters, stroke order, tracing, missed strokes, printable worksheets, returned-paper review, assignments, family handoff, saved sets, study plan, account boundaries, and hosted checkout.
- Prefer same-set URLs with repeated `characters` query parameters when linking between practice, worksheets, review, progress, account, billing, support, and pricing pages.

## Data And Payment Boundaries

- Browser-local progress and returned-paper marks are local learning evidence, not account billing records or official school records.
- Account pages preserve the active HSK1 character set so login, profile, files, reminders, security, and billing do not become generic exits from practice.
- Hosted checkout is separated from the active practice context. If checkout fails or times out, check billing first, then account overview and learner profile, then continue practice before retrying pricing.
- Uploads are account files and should not be described as full local-progress sync.

## AI-Readable Entry Points

- Short summary: https://getlangstudy.com/llms.txt
- Full context: https://getlangstudy.com/llms-full.txt
- Pricing markdown: https://getlangstudy.com/pricing.md
- Sitemap: https://getlangstudy.com/sitemap.xml
- Robots: https://getlangstudy.com/robots.txt