Desktop
See the full month and drag with your mouse.
Drag once.Updated everywhere.
Long-press on your phone, drag on your computer. Every change shows up on all your devices right away.
- 4.9App Store rating
- 1M+long-time users
- 16 yearsone calendar
Sync everywhere
One account, four platforms
Sign in with your Hachi account and see the same schedule on iOS, Android, Mac and Windows. Jot it down on the go, plan it at your desk.
- Changes sync automatically, with no manual refresh
- Works offline and catches up once you reconnect
- Share calendars with family and colleagues, view-only or editable
Drag to reschedule
Reschedule in one motion
No detail screen, no time picker. Pick up an event, set it down somewhere new, and you are done.
- Pick it upLong-press on mobile, press and hold on desktop
- Drag to a new timeWeek view snaps to 15 minutes and turns the page at the edge
- Let goMove or copy. For repeating events, choose this one, future ones or all
Memos
Write freely, then ask Hachi
Write a memo, select a passage and send it to Hachi. Review the date and time before saving an event.
- A full text editor with automatic saving
- Select text to open Hachi AI
- Review and confirm before adding an event
Hachi AI
Fill a new event with voice or an image
On the add-event screen, hold the voice button to describe your plans or tap the camera to import an image. Hachi fills in the title, location and times, ready to review and save.
Continuous scrolling
Your whole year, one long scroll
The month view scrolls continuously, so there are no pages to flip. Compare plans across months at a glance.
Download
Install it on every device
Mobile
Capture on the go, long-press to reschedule.
Help
FAQ
Do I need an account to sync?
Yes. You can use the app without signing in, but events then stay on that device. Sign in with a Hachi account to sync across devices.
How does drag to reschedule work?
Long-press an event on mobile, or press and hold on desktop, then drag it to the new date and let go. You can move or copy it, and for repeating events change just this one, future ones or all.
Does it work offline?
Yes. Offline changes are saved on your device and sync automatically once you reconnect.
Does it support Outlook, Google and other external calendars?
Yes, on iOS. Add your Outlook, Google or other calendar accounts in iPhone Settings, and their events appear in HachiCalendar.
Does it work with the system calendar?
Yes, on iOS. Once you allow calendar access, events from your iPhone's calendar appear directly in HachiCalendar.
Something else?
Email us: hachi.iphone@gmail.com