01Choose
Pick the mood that fits.
Good, okay, or not so good. Three simple choices for today’s feelings.
A little moment, just for you
Every kind of day.A page of your own.
Save today’s mood with three simple choices. Discover what makes a good day for you, and how that changes as you grow.
A little room to breathe.
Good days. And every other day.
MY DIARY
A sample diary entry
How was your day?
The sky was beautiful on my way home. A little thing that made today feel good.
One little moment of joy.
LITTLE MOMENTS
My everyday moments.
Look back. Find a little insight.
Good days. And every other day.Three choices. A little more you.
You don’t have to write a lot to learn a little about yourself.
02Keep
A few words, only if you feel like it.
A mood mark is enough on quieter days. Keep going at your own pace.
03Discover
Look back and understand yourself.
Daily reports are free. Find a little insight behind your everyday moods.
Why Know Your Standard?
Happiness quietly fades behind habit and assumptions. Knowing your own standard is the surest way to get it back.
01Reclaim the happiness you've gotten used to
No matter how wonderful something is, it turns into "normal" as the days go by — and the bar for a good day keeps rising without you noticing. Looking back at your records, you'll find "this used to be more than enough." You get to savor, all over again, the happiness that had become invisible.
02Break free from "if only I had that"
The bigger something looms in your mind, the smaller its effect on your everyday mood tends to be. Even when you get it, the good days often don't increase as much as you expected. What stays in your records isn't imagination — it's the things that actually made your days good. You see, as fact, what truly makes you happy.
03From chasing happiness to savoring it
Without knowing your own standard, all you can do is keep chasing "more." Once you see what actually works and what doesn't, you can spend your limited time and money on the things that truly lead to good days.
Your App Experience
Here's how Triad Journal transforms your daily life
STEP1
Build a Lasting Habit
Just 3 seconds a day. Simply choose "Good day," "Okay," or "Bad day."
No wondering what to write. Zero guilt for skipped days.
First, build the habit of recording itself.
STEP2
Deeply Know Yourself
From continuous records, AI analyzes your values, strengths, and personality.
Schwartz Theory, VIA Character Strengths, Big Five.
Gain deep self-understanding based on psychological research.
STEP3
Daily Insights Support
Daily reports help you reflect on your emotions and their context.
"Why was today a good day?" "What made it just okay?"
A journaling experience with insights, not just writing.
STEP4
Notice the Shift in Your Standard
As your records build up, you can see the difference between your old "good days" and today's.
People quickly get used to good things. And "I'd be happy if only I had that" is often just an assumption — psychologists call these the hedonic treadmill and the focusing illusion.
So what matters isn't chasing a higher good-day count. It's noticing how your standard changes — accepting that you change, and choosing the good days that fit who you are now.
ENDORSEMENT
Endorsed by Professors of Happiness Studies & Psychology
The "calendar circle-cross method" I described in my book 'The Mechanism of Happiness' has evolved. I sincerely hope that this app, developed by Saeki — my former student and happiness researcher — will help improve the well-being of many people.
Keeping a diary and reflecting on daily life is an effective practice for cultivating psychological richness. Translating psychological knowledge into everyday tools is a challenging endeavor, but Saeki's app shows real promise. I look forward to it enriching many people's lives.
User Reviews ✨
★★★★★
An App That Deserves More Popularity
• You can just pick from 3 choices, or write freely - you can use it however you feel that day, so even I, who gets bored easily, can keep using it! • The review reports come weekly, monthly, plus special reports. Recently I received a Self-Care Report and was amazed by its content. It was a week when something sad happened that I didn't want to talk about with anyone, but the report addressed it with such heartfelt content. • I sent a request through the app to make reports printable, and soon after, a PDF export update was added!
— Sakura (Woman in 20s)
★★★★★
Exactly What I Wanted
I think even easily-bored people can keep using this diary. When sleepy or unmotivated, you can just pick your mood from 3 choices - that's great. Personally, my favorite point is the carefully crafted UI. No ads, user-friendly, and I really love the calm atmosphere.
— Azusa (Woman in 20s)
★★★★★
Accurate Advice
The app gives faithful and accurate comments based on what I wrote, which makes me want to continue. Plus, the comments are gentle with no harsh advice, making it easy to open up completely.
— Hana (Woman in 20s)
Start your diary with three simple choices.
Get started for freeFree daily reportsPremium from ¥400/month
Frequently Asked Questions
Answers to your questions
Supervisor & Developer
Masao Saeki
Ph.D. A researcher in psychology and behavioral science, engaged in research on happiness and cognition. With a mission to "turn academic insights into tools everyone can use daily," he developed the Triad Journal app. Supporting your mental care with research-based logic.
Awards
- Securities Analysts Journal Award (May 2015)
- Behavioral Economics Society Encouragement Award (December 2013)
Free DownloadToward a life where you
Toward a life where you
notice how your good days change
Record in 3 seconds, AI analyzes.
Notice how your idea of a "good day" shifts and
find the happiness that fits who you are now.