CHAC help centre
Learn Chinese characters, privately.
CHAC is an offline-first Chinese character learning app. Learning works on your device without an account, with a free ad-supported tier and optional store purchases to remove ads.
Support and contact
For help with CHAC, accessibility feedback, or a privacy question, email pim@vogtov.com. Please do not include sensitive personal information in your first message.
- App
- CHAC
- Operator
- VOGTOV
- Current data model
- Offline progress stored on the device, with optional account sync and update preference
- Ad-free access
- Optional monthly, yearly, or lifetime purchase through the app stores
- Last updated
- 7 September 2026
How the app works
How CHAC decides you have learned a character, a plain explanation of the review schedule, the five mastery tiers, and why one wrong answer resets a character.
How CHAC explains a character, including Pattern Scrolls and Sentence Forge practice for sentence tools, plus components, compact forms, historical origins, memory cues, and the public sources behind them.