Try using personal notes, customized notes for each friend, and shared notes with friends.
- Share things to do and information you should not forget with your partner.
- Write a note to share with multiple friends
- Record notes for each friend according to each situation.
- When doing business, write down what you need to remember for each partner company representative.
- Teachers can record and check special information about students.
- Share important information with meeting/friend group members

1. Custom memo for each friend (secret box)
- Customized notes for each contact-based friend
- My own secret memo that the other party cannot see

2. Shared notes for each friend (shared box)
- Memos that can be shared with friends/lovers
- Possibility to edit and supplement mutual notes

3. Group memo (shared box)
- Share notes with multiple friends
- Possibility to edit and supplement mutual notes

4. Personal memo
- Text-based notepad