End your day with
Callog, your AI diary

How was your day today? Share your emotions and stories with AI
and record your special day together.

App Store 4.7  ·  Google Play 4.8  ·  316 ratings across both stores (as of July 2026)

Callog AI diary app fox character

Daily AI Diary
Your Personal Journal Record

The emotions and stories you might miss in your busy day,
now share them comfortably with AI and record your precious day.

AI Diary & Daily Conversation

Write down or speak about your day. AI naturally continues the conversation and listens to your daily stories.

Emotion Analysis & Reports

AI analyzes your diary content and provides detailed emotion reports. Understand your emotional patterns as they change over time.

Personal Emotion Archive

Automatically records all daily conversations and emotional changes. Compare your past and present self to see your growth.

AI's Warm Letters

AI sends you personalized letters on special days or during emotional changes. Feel that you're not alone.

Callog AI diary friend fox character

How was your day today?

Callog gives you a moment to face yourself in the middle of a busy day.

Experience a new kind of AI diary — record your day, share it with AI, and understand your emotions.

From AI Diary to Emotion Analysis
All in One

Voice diary that starts with natural conversation, AI understands and records your day
Talk together, organize emotions, and grow

Summaries and Analysis Generated Just for You
Including Metrics and Reports

AI analyzes and understands your daily emotions.
Track your changing emotional flow and understand yourself objectively.

Callog emotion analysis report screen with emotion graph and statistics Callog AI emotion analysis report screen Callog AI diary automatic summary screen Callog inner-state analysis report screen

Natural Daily Conversation
with AI

How was your day? Start with natural conversation.
AI will listen to your story to the end.

Callog voice diary voice settings screen Callog AI voice call diary screen Callog AI chat diary conversation screen Callog daily voice conversation with AI screen

AI that Remembers You and
Grows Together

AI remembers your daily stories and grows with you.
Record each day with your personal AI diary friend.

Callog app home screen - start a voice diary or chat diary Callog my page screen Callog app main dashboard screen

Not Just Daily Conversation Records
Special Experience with Letters

Review past conversations to see your growth,
and receive warm letters from AI written just for you.

Callog AI letter box screen Personalized letter sent by Callog AI screen Callog diary list screen
"
You worked hard today too.
Please tell me your story.
Let's share and organize your mind together.

AI Diary Time with Fox

Callog isn't just a diary app. It's an AI friend that remembers and understands your days.

Never misses even the smallest emotions of your day

AI remembers your daily life and grows with you

Record freely with both voice and text

Better understand yourself through emotion analysis

Track your daily growth and changes objectively

Callog fox character joining your diary time

Users' Genuine Reviews

Check out real experiences from Callog users

Speaking out loud really helped me organize my thoughts better than expected. I couldn't keep up with written diaries, but this makes me continue.

At the end of the day, speaking casually helps me reflect on emotions and feel comforted. It's like a friend who takes care of my feelings.

On a suddenly depressed day, speaking and recording made my heart much lighter. I didn't know just talking could be this helpful.

It's amazing how recording with my voice keeps emotions more vivid. When I listen back later, I can feel exactly what state I was in that day.

I've been keeping a voice diary before bed to organize my day, and it's become a habit. It's such a good time to quietly reflect on myself.

Start Callog Now

Organize, express, get comfort, and recover your emotions.
Daily small conversations will make you a little stronger.

Start Your Journaling Habit with Callog

Callog is a diary app that brings your daily journal, emotion journal, and gratitude journal together in one place. Instead of staring at a blank page, you simply talk. Chat with your AI friend about how the day went, or leave a voice diary as naturally as making a phone call — Callog listens, asks thoughtful follow-up questions, and turns the conversation into a finished diary entry for you.

Every entry also becomes a window into your inner world. Callog analyzes the emotions behind your words and builds emotion graphs, an emotion calendar, and inner-state reports, so you can watch your moods shift over days and weeks. When something is weighing on you, talking it through with the AI can help you untangle your thoughts and take better care of your mind.

If keeping a diary has always felt like a chore, the conversational approach changes everything. A few minutes of chat or voice at the end of the day is enough — the AI handles the writing. Add a gratitude note about the small good moments, and over time you build a rich, searchable archive of your days without ever forcing yourself to write.

Callog is more than a diary app. It is a companion for emotional self-care: a place to record your feelings, reflect on them, and grow a journaling habit that actually sticks. Download Callog and start your first conversation today.

Frequently Asked Questions

What is Callog?

Callog is an AI diary app where you keep a journal by talking with AI. Share your day with an AI friend via voice call or chat, and the conversation is automatically organized into a diary entry with an emotion analysis report. Free to start on iOS and Android.

How does the voice diary work?

Tap the call button in the app and talk about your day as if you were on a phone call. The AI naturally leads the conversation with follow-up questions, and when you finish, everything is automatically organized into a diary entry and summary. Perfect if typing feels like a chore.

Is Callog free?

Yes, it's free to download and start right away. For unlimited AI conversations and deeper emotion analysis, premium subscriptions (monthly/yearly) are available.

How does emotion analysis work?

The AI analyzes your emotional state based on your diary entries and conversations. Emotion graphs, an emotion calendar, category statistics, and inner-state reports let you see how your emotional patterns change over time.

Is my diary data safe?

Yes. All diary entries are securely stored in the cloud, linked only to your account, and accessible only when you're signed in. Deleting your account also deletes your data.

Who is Callog for?

It's great for anyone who wants to keep a diary but never sticks with it, who wants to talk through their day out loud, or who needs emotional tracking and self-care. Since the AI leads the conversation, even first-time journalers can start effortlessly.

What are AI letters?

Callog's AI friend remembers your diary and emotional journey, then sends you personalized letters on special days or when you need comfort. Check your letter box for warm messages written just for you.

Which devices are supported?

Callog is available on iPhone (iOS) and Android smartphones. Search for 'Callog' on the App Store or Google Play. It supports 16 languages including Korean and English.