hak - Support

An offline flashcard app for learning Japanese, Korean, and Chinese vocabulary.

Features

• Japanese vocabulary (Hiragana, Katakana, Kanji) — JLPT N5 and N4 word lists
• Korean vocabulary (Hangul) — 572 A1-level words
• Simplified Chinese (Hanzi + Pinyin) — HSK 3.0 Level 1
• Traditional Chinese (Hanzi + Bopomofo) — TOCFL Novice and Level 1
• Handwriting practice with on-device recognition
• Text-to-speech pronunciation
• Backup and restore your progress
• Completely offline — no account, no tracking, no notifications

Support

If you encounter any issues or have questions about the app, please reach out:

FAQ

Is the app free?

Yes, the app is free to use.

Does the app require an internet connection?

No. hak works fully offline. The only network activity is a one-time download of handwriting recognition models from Google when you first enable that feature.

What languages are supported?

Japanese, Korean, Simplified Chinese, and Traditional Chinese. All four are enabled by default and can be toggled in settings.

How do I back up my progress?

Open the settings menu and use the backup feature to export your progress to a file of your choice. To restore, pick that file with the restore feature. Backups stay on your device unless you share the file yourself.

How does handwriting practice work?

Handwriting recognition runs on your device using Google ML Kit. The first time you use it, the app downloads the recognition model for each language you practice; after that, no network connection is needed.

Privacy

hak does not collect or share any personal data. All progress and preferences are stored locally on your device. See the privacy policy for details.