Syn9

Just talk — your plans and notes fall into place. Syn9 makes sharing schedules and notes with family and friends simple. Koe, your AI assistant, turns what you say into events and shares them with the right people.

Choose who sees each schedule and note. Family, friends, groups — switch the audience to match the moment.

Koe (AI assistant)
- Say "dinner tomorrow at 7" — Koe creates the schedule
- "Share with my crew" — Koe knows your friends, groups, and the nicknames you use
- Ask anything — Koe searches the web too

Schedules
Choose who to share each event with — family schedules for family, friend plans for friends. Each event gets its own chat so you can coordinate without losing context. Reminders and recurring events keep nothing slipping through.

Notes
Share shopping lists, trip plans, and more — with whoever you choose. Edit lists together in real time so no one's grocery list is out of sync. Lock private notes so only you can open them.

Chat
Tap any schedule or note to open its chat — never lose the thread. Group with friends-of-friends without exchanging contacts. Reactions, pins, and unread badges keep things organized.

Friends
Add friends easily via QR code or a shareable link. Set your go-to share list in advance to save time every time.

Push Notifications
Get notified instantly when a schedule, note, or message is shared with you. Never miss what matters.

Make everyday life with family and friends smoother and more fun. Give Syn9 a try.

Terms of Use & Privacy Policy:
https://syn9.jp/en/terms-of-service/
https://syn9.jp/en/privacy-policy/