Lumie 感情日記 - AIがあなたに寄り添う

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10+
Downloads
Content rating
Everyone
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About this app

Just by writing, you can feel lighter.
This emotional diary app uses AI to analyze your emotions and deliver empathetic words and advice.
The next morning, you'll receive a "reflection letter" from AI.

Lumie is your self-care partner, visualizing your emotions simply by writing in your diary.
Working with AI to help you feel better.
Try writing down those "feelings you can't share with anyone else."

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◆ What you can do with Lumie
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[AI Analyzes and Visualizes Emotions]
As you write in your diary, AI scores seven emotions (joy, trust, anticipation, surprise, sadness, disgust, and anger). You'll discover inner workings you may not have noticed before. You'll receive gentle, supportive words and advice without dismissiveness.

[Next-Morning Reflection Letter]
The morning after you write your diary entry, AI will deliver a letter tailored to your emotions. Receiving warm words first thing in the morning will help you start your new day on a positive note. This special feature, exclusive to Lumie, will give you a reason to open the app every morning.

[Easily Record with Stickers]
On days when you can't find the words, simply choose a sticker that matches your current mood. You can intuitively record your daily emotional flow in three time periods: morning, afternoon, and evening.

[Converse with Your Past Self]
AI will search through your past diary entries to find and suggest days when you felt similar to the one you're experiencing now. "I was struggling in the same way back then," or "I overcame it surprisingly well." Your past self will support you in the present.

[Realize Change with Weekly Reports]
Look back at your weekly emotional flow in a graph. By noticing your emotional patterns, you can identify causes of stress and triggers for emotional stability.

[Easy Recording with Voice Input]
On days when writing is too difficult, just speak. Your voice is converted to text and saved as a diary entry.

[Kotodama Notebook]
Save the words and important insights from AI as "Kotodama" (spirits of words). It's your own personal talisman to refer back to when you're feeling down.

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◆ Recommended for
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・Want to relieve daily stress and frustration
・Interested in mental health and self-care
・Want to sort out anxiety and feelings of uncertainty
・Want to increase self-esteem
・Want to openly discuss worries with AI
・Want to develop a journaling and reflection habit
・Want a simple and beautiful diary app

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◆ About the Design
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The Japandi style combines the tranquility of Japanese culture with the warmth of Scandinavia. With eye-pleasing colors and a design that emphasizes white space, we aimed to create a calming space where you can take a deep breath just by opening the app.

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◆ Privacy
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Your diary entries are securely protected and will not be shared with third parties as training data for the AI. Please use with confidence.

■ Terms of Use
https://www.emotional-diary.com/terms

■ Privacy Policy
https://www.emotional-diary.com/privacy

Why not start a habit of calming your mind with Lumie today?
Updated on
Mar 23, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App info and performance
Data is encrypted in transit
You can request that data be deleted

What’s new

バージョン 1.1.5 最新情報

日記がもっと豊かになりました。

- 写真日記: 日記に写真を添えて、その日の思い出を残せるようになりました
- 日記検索: キーワードで過去の日記を検索できるようになりました
- 感情の目標設定: なりたい自分に向けて感情の目標を設定し、変化を追えるようになりました
- はじめての方へ: アプリの使い方をわかりやすくご案内するようになりました
- 統計画面のデザインを改善しました
- その他、安定性の向上とバグ修正

いつもLumieをご利用いただきありがとうございます。
ご感想やご要望は「設定」からお気軽にお聞かせください。

App support

Phone number
+817047985379
About the developer
橘川 和輝
contact@nano-invitation.com
門沢橋2丁目7−32 海老名市, 神奈川県 243-0426 Japan