심다 - 감정일기,감사일기,자기돌봄 앱

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About this app

Simda is an emotion diary app that allows you to record and reflect on your feelings for the day in just 5 minutes.

Days when you feel anxious or depressed, or days when your heart feels heavy for no reason. If you let those feelings pass without knowing where they came from, the same thing will happen again. Simda helps you record your emotions and examine for yourself the situations and thoughts that triggered them.

■ Emotion Diary — Examining Your Mood Cycle

Record the events of the day, the thoughts that came to mind, the emotions felt, and even your actions and physical reactions at the time, in chronological order. As your scattered day connects into a single flow, you will begin to see the sequence in which your mood moves.

You can choose both uncomfortable and positive emotions. After all, you might feel anxious followed by relief, or upset followed by a sense of relief. Finally, you can select small changes you can make right now from your thoughts, actions, or sensations. It is perfectly fine to finish without making a choice if you feel overwhelmed.

■ Gratitude Diary — Recording Good Moments

Write down one thing you were grateful for each day. It is okay if it is trivial. Good memories fade quickly if not written down, but if preserved, they become a record you can look back on during difficult days.

■ Savoring Positive Experiences

This activity involves recalling and fully savoring enjoyable experiences. Practicing lingering in good moments rather than letting them pass by builds mental resilience.

■ Writing Letters of Self-Compassion

There are times when you are the harshest person to yourself. This activity involves writing a letter to yourself as if you were writing to a close friend. It is a practice to shift from self-blame to understanding.

■ Mindfulness and Body Care

Focus on your breath and senses to return to the present moment. Learn how to stabilize your body first when your thoughts race ahead.

■ Self-Check of Your Mind

You can check your levels of depression, anxiety, and positive emotions. Checking your current state numerically allows you to see the true nature of vague discomfort more clearly.

■ Mind Change Report

As your records accumulate, it will show you at a glance which emotions have frequently occurred and in what situations your mood has been shaken. You may not fully understand it day by day, but when you look back over a month, the patterns of your mind become apparent.

■ Growing a Mind Tree

As you continue the activities, your own unique mind tree grows. The process of starting as a seed, sprouting, and becoming a tree serves as a small motivation to continue recording.

■ Recommended for:

- Those who experience frequent mood swings and wish to understand their own minds

- Those exhausted by anxiety, depression, or burnout who need mental care

- Those who want to keep a diary but feel lost on what to write first

- Those looking for a mood tracker or mood recording app

- Those who want to build self-esteem and self-understanding

- Those who want to briefly practice meditation and mindfulness in their daily lives

- Those who want to build a habit of summarizing their day before going to sleep

■ Simda's activities are based on positive psychology and cognitive-behavioral approaches

We do not tell you to suppress your emotions or to think positively unconditionally. The program is structured to guide you through the process of acknowledging your current emotions as they are, understanding where they originated, and trying out small changes you can make.

** ■ Used in Schools and Counseling Settings

Simda is utilized not only by individual users but also in schools and counseling settings. Teachers can monitor students' activity participation, and students manage their own records. The content of individual diaries is protected; please submit inquiries regarding implementation via the "Contact Us" feature within the app.

■ Records Are Stored Safely

The content you write is encrypted and transmitted, and is not shared with third parties. You can request data deletion at any time.

■ Don't Forget with Daily Notifications

You can receive notifications at your desired time to maintain a 5-minute daily journaling habit. You can freely change or turn off notification times.

■ How to Get Started

1. Write down in a single line what affected your mood today.

2. Select the thoughts that came to mind and the emotions you felt at that moment.

3. Once you record your physical reactions as well, your mood cycle for the day is complete.

3 minutes is enough for the first time. We have prepared example sentences on every screen for when you are at a loss as to what to write.

■ Frequently Asked Questions

Q. Is it okay if I'm not good at writing diaries? A. You don't have to write long entries. Simply write a single line about the situation, and select your emotions and actions from the list to complete your record.

Q. Do I have to write every day?

A. No. Even if you only write on the days you feel like it, the report is created solely from those records. Since writing becomes burdensome and leads to a break in recording, Simda does not force you to write every day.

Q. Does my entry disappear if I exit the app?

A. The content you were writing is saved as a draft, so you can continue writing even if you visit another app.

Q. Can others see my records?

A. No. Only you can view your diary entries.

Q. Do I need an internet connection?

A. An internet connection is required to save your records and view your report.

Take just 5 minutes to look into how you felt today. As those 5 minutes accumulate, the way you understand yourself will change.

※ Simda is not a medical device that provides medical diagnosis or treatment, and it does not replace professional medical services. If you experience persistent difficulties, please seek professional help.
Check on your mind with a 5-minute daily emotion journal, and build healthy mental habits through gratitude journals and self-care activities.
Updated on
Aug 27, 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
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

• 지문 간편 로그인을 추가했습니다.
• 다른 앱을 다녀와도 작성 중이던 감정일기가 사라지지 않도록 개선했습니다.
• 감정을 고를 때 불편한 감정과 긍정적인 감정을 함께 선택할 수 있습니다.
• 알림을 눌렀을 때 해당 화면으로 바로 이동합니다.
• 하단 메뉴가 기기 제스처 영역에 가려지던 문제를 수정했습니다.
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Everyone
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App support

About the developer
박세정
sejeong7430@naver.com
South Korea