passNote vs HEERTI

Exchange diaries are a traditional form of communication in Japan, where people share their daily experiences and thoughts through a notebook. Even today, they remain popular among young people, offering a slower and more meaningful alternative to social media and instant messaging. With this app, you can easily experience the charm of exchange diaries on your smartphone. Share your daily life, hobbies, and thoughts while getting to know someone little by little. Unlike short messages, exchange diaries help build deeper connections. By taking time to write and respond, you can learn about each other's values and perspectives and develop lasting relationships. You can also connect with people from around the world. Discover real daily life, culture, school, work, and traditions that cannot be fully understood through travel or social media alone. Exchange diaries are also a great way to learn languages. Built-in translation helps you communicate with confidence while naturally learning real expressions used by native speakers. Why not start a special exchange diary with someone, somewhere in the world?

HEERTI is a private chat app that only fans invited by a creator can join. Hear from your favorite creator up close, and send your love right back. ■ Invite-only • Apply with the invite code your creator shares. Once the creator approves, you're in the room. • No strangers outside the room can contact you. Members can't see each other's messages or contact details. ■ Conversations with your creator • Messages your creator sends to everyone and private messages sent just to you arrive in one place. Private messages are clearly marked. • Share photos, videos and voice messages. • Send hearts to the messages you love. ■ Read in your language • The app is available in Korean, English, Chinese (Simplified and Traditional) and Japanese. • Translate a message into your language right on your device, or turn on auto-translate (iOS 18 or later). ■ Letters • Letters your creator writes to you arrive in your mailbox. They stay there even if you change phones. • You can reply to the letters you receive. ■ Schedules, D-days and polls • Check your creator's lives and fan meetings on the room calendar. • Upcoming events show as D-days at the top of the chat room. • Vote in polls your creator opens in the room. ■ For creators • Send to the whole room, or pick one member and send a private message. • Review join requests and approve or decline them. You'll get a notification when a new request arrives. • Run your room with notices, schedules, welcome messages for new members and short notes for each member. ■ Safety • Lock the app with a PIN, and unlock it with Face ID or Touch ID. • Choose in the Me tab whether notifications show the sender and message content. • Our servers keep messages, photos, videos and voice messages for only 30 days. Conversations you receive are kept on your device. • Report inappropriate messages, and our team will review them and take action. • Location data is removed from photos and videos before they're saved. ■ Good to know • You must be 14 or older to join. • Sign in with email verification. There's no password to create. • Use the same account on iPad and in a web browser (heerti.sonse.kr/app). Contact: qna@sonse.kr