Kioku: Japanese Word Widget

Japanese on your Lock Screen

Only for iPhone

Free · In‑App Purchases

iPhone

Now with Test mode: quiz yourself on that many words that you learnt without even trying. Free forever with Hiragana/Katakana and JLPT N5 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. Fully offline. No account, no data collection that identifies you, 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 that identifies you. 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/

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

- Expanded device support and small reliability improvements.

Version 1.2.1

The developer, Jesus Ernesto Jaramillo Salazar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Jesus Ernesto Jaramillo Salazar
Size
  • 37.2 MB
Category
  • Education
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
Languages
  • English
Age Rating
9+
In-App Purchases
Yes
  • Kioku Pro Yearly $9.99
  • Kioku Pro Lifetime $19.99
  • Kioku Pro Monthly $1.99
  • Learn More
Copyright
  • © 2026 Ernesto Jaramillo
  • Developer Website
  • Privacy Policy

    • More by Jesus Ernesto Jaramillo Salazar

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