• No personal data collected

• Word searches and video viewing are processed transiently

We collect only what is necessary to provide personalized learning:

• Email address

• Searched words (saved to your word bank)

• Vocabulary lists

• Quiz and review performance data

Users can delete words from their word bank at any time.

We use data only to:

• Show your saved vocabulary

• Generate personalized quizzes and reviews

• Maintain and improve app functionality

We do not sell or use data for advertising.

Kai shows 2–3 second, non-substitutable video clips from movies or TV shows strictly for language learning.

• Clips are paired with definitions and subtitles

• No full scenes, downloads, playlists, or offline access

• Streams are ephemeral and length-limited

We promptly remove content upon valid request.

Limited usage data is processed to improve app performance. When logged in, this data may be associated with your account. No unnecessary identifiers or chat logs are collected.

Users may request account deletion by contacting:

All associated data will be deleted within a reasonable timeframe.

Kai Dictionary is designed for a general audience.