haru
AI-Powered Personal Diary

Don't know what to write?
Just chat with haru.

haru listens, writes, and understands.

"haru" means "a day" in Korean.
haru isn't just for writing — it's for being heard. Speak freely or write silently — haru gently adapts to you. With thoughtful AI chat or classic diary mode, haru helps you process what matters and feel truly seen.

haru app calendar view
Signature Feature

Switch between chat & writing.
Instantly.

Start your journaling as a traditional diary... or begin chatting with AI. You can switch between the two modes anytime, even mid-entry. No other app does this.

AI Chat Mode
AI: "How was your day?"
You: "Pretty stressful, actually..."
Free Writing Mode
📝 Your thoughts
"Today felt overwhelming. The meeting went better than expected though..."
Switch modes anytime with one click

Three ways to express your inner world

Choose your journaling style: AI-guided conversations, traditional writing, or write first then reflect with AI - each helping you explore emotions and discover new insights about yourself.

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AI Conversation Journaling

Chat with haru's empathetic AI companion that asks thoughtful questions, helps you process complex emotions, and guides you toward deeper self-understanding. It's like having someone who truly listens, available 24/7.

AI conversation illustration showing a friendly robot chatting with a user
💭 AI: "How did that conversation make you feel?"
🙋‍♀️ You: "It made me realize I need to set boundaries..."

Traditional Free Writing

Express yourself freely with classic diary writing. Pour your thoughts onto the page without any guidance - perfect for stream-of-consciousness writing and personal reflection.

Traditional journal writing illustration
📝 Your Entry
"Today was a whirlwind of emotions. I woke up feeling anxious about the meeting, but it went better than expected..."
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Write First, Reflect with AI

Write your journal entry in traditional style, then let our AI companion provide thoughtful reflections and insights about your experience. Perfect for those who prefer to express first, then explore deeper meanings together.

Write first then reflect with AI illustration
🤔 AI: "I notice you mentioned feeling anxious but then relieved. What do you think helped the meeting go better than expected?"

Additional features to enhance your story

Beyond the core journaling experience, these features help you track patterns, revisit memories, and build sustainable habits.

Mood Calendar

Track your daily emotions with a beautiful calendar view. See patterns in your moods and celebrate the good days while learning from challenging ones.

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😌
🥰
🤔
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Timeline View

Browse through all your entries in a chronological timeline. Rediscover forgotten memories and see how you've grown over time.

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Evening Reflection
Oct 19
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Peaceful Evening
Oct 18

Smart Insights

Get personalized insights from your journaling patterns. AI analyzes your emotions and provides gentle guidance for your daily diary practice.

Weekly Insight

"You've shown great resilience this week. Consider celebrating small wins..."

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Sustainable Journaling Habit

Write up to 3 entries a day. This gentle limit helps you build a sustainable, pressure-free journaling habit without overwhelming yourself. Quality over quantity.

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Peaceful journaling space

Streak
7 days
Entries
23 this month

AI that truly understands you

haru's AI companion uses advanced emotional intelligence to provide personalized guidance. Unlike generic chatbots, haru's AI learns your communication style and offers meaningful support tailored to your personal diary experience.

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Emotional Intelligence
AI that recognizes subtle emotional cues and responds with empathy
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Thoughtful Questions
Asks the right questions to help you explore deeper feelings
Takes Time to Build
Good friendships take time to develop. Building a meaningful connection with your AI companion is a gradual, rewarding process.

Real moments, real transformations

See how haru helps people navigate life's ups and downs

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When exam stress hits hard

"I was drowning in exam anxiety. haru's AI asked me 'What's the scariest part about tomorrow?' Suddenly, I could name my fear and work through it."

Soyeon, 22, College Student

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After a difficult breakup

"Instead of bottling everything up, I talked to haru. The AI helped me see patterns in my relationships I never noticed before."

Takeshi, 28, Designer

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Daily gratitude practice

"Three entries a day? Perfect. Morning intentions, lunch reflections, evening gratitude. It's become my mental health routine."

Minji, 31, Teacher

Why only 3 entries per day?

We designed haru to encourage sustainable journaling habits

Quality over quantity

Focus on meaningful moments rather than endless documentation

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Prevents overwhelm

No pressure to write everything - just what matters most

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Natural reflection rhythm

Morning intentions, midday check-in, evening reflection

Start journaling — your way

Whether you prefer thoughtful chats or quiet reflection, haru supports both. Switch anytime, stay consistent, and rediscover yourself.

Both AI chat and traditional writing included

© 2025 Polaris. All rights reserved.