Lumi - Your Language Buddy

Lumi Speaking Practice App: Practice Japanese and English with Hikari!

From text chats and voice conversations to call mode and roleplay, learn languages naturally, just like chatting with a friend
Don’t worry about making mistakes. Practice speaking Japanese and English in the most natural way

【Immersive Learning, a Little Progress Every Day】
The most effective way to learn a language is to actually speak it. There’s no need to memorize difficult vocabulary. Just chat casually with Hikari every day to gradually develop your language intuition and speaking confidence
Lumi gives you a personal AI language-learning companion. You can talk to Hikari anytime. After upgrading to Lumi Pro, long-term memory allows her to remember what you’ve said and the things you like, gradually get to know you, and provide a more personalized learning experience!

Lumi Core Features

1. Text Chat — Chat casually with Hikari in Japanese or English
2. Voice Conversations — Practice real-time two-way speaking and improve your listening and response skills
3. Call Mode — Enjoy deeper, more immersive conversations through a realistic call interface
4. Roleplay — Practice real-life situations such as ordering food, job interviews, and airport immigration
5. Photo Chat — Take a photo of what you see and discuss it with Hikari in Japanese or English
6. Instant Feedback — Analyze your grammar and expressions to help you learn more effectively
7. Dictionary & Daily Practice — Use a Japanese-English dictionary and personalized daily vocabulary practice
8. Long-Term Memory (Lumi Pro) — Let Hikari remember your preferences and conversations for a personalized learning experience
9. Learning Stats — Track your learning streak, experience points, and progress

If you subscribe to Lumi Pro's monthly or yearly plan, the subscription fee will be charged to your Google Play account. Renewal fees will likewise be charged to your Google Play account within 24 hours before the end of your current subscription period. After completing your purchase, you can turn off auto-renewal at any time in your Google Play subscription settings. If you subscribe before your free trial ends, any remaining free trial days will be forfeited once the purchase is confirmed.


For any feedback or questions, please contact us at:
hoshinohikari1031+support@gmail.com

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