Kioku: Japanese Word Widget

Learn Japanese without opening an app.

Kioku turns your lock screen into a passive learning surface. A new word appears every morning, with kanji, reading, and meaning, so you can build your vocabulary just by glancing at your phone. No flashcards. No streaks. No study sessions.

START WHERE YOU ARE
New to Japanese? Kioku starts with hiragana and katakana, the foundation. Already past the basics? Jump straight into JLPT N5 vocabulary. Everything beginner is free.

HOW IT WORKS
1. Install Kioku
2. Choose your level (hiragana, katakana, or JLPT N5)
3. Add the widget to your lock screen
4. Glance throughout your day
5. Words stick through repetition, not memorization

A QUIET DESIGN
No mascots. No streak guilt. No notifications begging you to come back. Just a calm, editorial layout inspired by Japanese paper and typography. Noto Serif JP for the characters, soft warm crimson, generous space.

FREE FOREVER
• Hiragana (46 characters)
• Katakana (46 characters)
• JLPT N5 vocabulary (~670 words)
• 1 word per day
• Full lock screen and home screen widgets

UNLOCK MORE WITH PRO
Try Pro free for 7 days. Then $1.99/month, $9.99/year, or $19.99 one-time.

• All JLPT levels: N5, N4, N3, N2, N1 (~13,000 words)
• Up to 4 words per day
• Future features included

Cancel anytime.

WHY KIOKU
Most language apps assume you have time and willpower to open them daily. You don't, and that's okay. Kioku meets you where you already are, the screen you check 50+ times a day. Learning becomes ambient. It happens in the background of your life.

Built by a solo indie developer. Fully offline. No account, no data collection, no ads. Just words on your lock screen.

ATTRIBUTION
Dictionary data: JMdict/EDICT
© Electronic Dictionary Research and Development Group (EDRDG)
License: Creative Commons Attribution-ShareAlike 4.0
https://www.edrdg.org/jmdict/j_jmdict.html

PRIVACY
Kioku does not collect, transmit, or store any personal data. All vocabulary is bundled with the app. No account required.

Privacy Policy: https://hibana-com.github.io/kioku-site/privacy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/