AI日記ジャーナル:3択日記 心理学と振り返り

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About this app

A diary app that helps you notice changes in your "good days"

Simply choose one of three options each day.

The habit of choosing today's day from "Good Day / Average / Bad Day" in just three seconds will help you notice the changing "measure of a good day" within you.

■ No need to wonder what to write. That's why it lasts.

The three-option diary is for people who have never been able to keep a diary. Because you don't have to think about what to write, even on busy days or days when you're not in the mood, recording is completed in three seconds. There's zero guilt even if you miss a day.

■ For those who:
・Start a diary but give up after three days
・Want to know more about their own feelings and values
・Feel like they're just drifting through each day
・Want to use a calm, ad-free app

■ You will change in four steps

STEP 1 | Keep recording
3 seconds, 3 choices. Its simplicity prevents frustration, making "continuing" the first step.

STEP 2 | Getting to Know Yourself
Based on psychological theories (Schwartz's Values ​​Theory, VIA Strengths Assessment, Big Five), AI analyzes your values, strengths, and personality from your records. You'll discover aspects of yourself you weren't even aware of.

STEP 3 | Gaining Insights
Daily reflection reports gently articulate your emotions and the context of the day. In addition to weekly and monthly reports, there are also special reports. This is a diary experience that goes beyond simply "writing and forgetting."

STEP 4 | Noticing a Shift in Your Scale
As your records accumulate, you'll see how your definition of a "good day" has changed over time. You'll become aware of the gap between your assumptions and your true feelings, and learn to cherish what constitutes a "good day" for you now.

■ Bringing Psychological Insights into Everyday Life
This app is supervised by a PhD in psychology. It was developed with the mission of "turning academic insights into tools usable in everyday life."

"The method I described as the 'Calendar Circle/X Method' in my book 'The Mechanism of Happiness' has evolved."
— Professor Takashi Maeno (Dean of the Faculty of Wellbeing, Musashino University)

"This is a challenging endeavor to translate psychological insights into a tool that can be used in everyday life."
— Professor Shigehiro Oishi (Professor of Psychology, University of Chicago)

■ Safe and Easy to Use
• No advertisements whatsoever
• Calm, gentle design
• AI comments that are faithful to and accurate with your diary

Try it for free for one week.

Your change begins with choosing today's "good day."
Updated on
Jul 25, 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
Location and Personal info
Data is encrypted in transit
You can request that data be deleted

What’s new

不具合修正を行いました
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About the developer
ALL GOOD
allgood.saeki@gmail.com
3-3-13, NISHISHINJUKU NISHISHINJUKU MIZUMA BLDG. 2F. SHINJUKU-KU, 東京都 160-0023 Japan
+81 70-2399-6435