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![Masao Saeki](https://ph-avatars.imgix.net/4851735/dffec842-f2ef-4952-b453-21522bc842bd.png?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=48&h=48&fit=crop&frame=1)
Masao Saeki
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I developed this app myself and i want it to go global! Evaluating your day with 3 choices every day is a great way to understand your mental state and capture changes in your tastes. People's values change subtly, but little by little. I believe it is a tool that allows us to know in real time what we value and what we no longer value. I would like to know how we can spread it globally.
![Penguin Diary](https://ph-files.imgix.net/7c6cbff0-f139-4948-b4f7-ee585b939560.png?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=48&h=48&fit=crop&frame=1)
Penguin Diary
Evaluate a day with 3 choices
![Masao Saeki](https://ph-avatars.imgix.net/4851735/dffec842-f2ef-4952-b453-21522bc842bd.png?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=48&h=48&fit=crop&frame=1)
This diary application improves the accuracy of daily happiness judgments by repeatedly judging whether a day was good or not, and allows users to understand their own views of happiness.
![Penguin Diary](https://ph-files.imgix.net/7c6cbff0-f139-4948-b4f7-ee585b939560.png?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=48&h=48&fit=crop&frame=1)
Penguin Diary
Evaluate a day with 3 choices