Stop dragging tasks into gaps by hand. Type what needs doing and FlexCal schedules it around your meetings, then reschedules it when your day changes.
Works with Google Calendar · Sign in with Google · No separate account
What it is
Most "AI calendar" tools help you book meetings with other people. This one does the opposite job: it protects time for your own work.
"Write report #work p1 by Friday for 2h". Duration, deadline, priority, project, in one line.
Meetings are fixed. Working hours and personal hours are the fences. Everything else is free time.
A constraint solver packs tasks by priority and deadline into real calendar events, in seconds.
Every 15 minutes it checks for changes and moves its own blocks, never your meetings.
How it works
Add the Chrome extension, sign in with Google, set your working hours and personal time.
Natural language quick add, Todoist-style projects and labels, habits like "Run 3× a week, mornings".
Blocks appear in Google Calendar within seconds. Move one and the assistant treats it as pinned.
Compare
Same idea, different shape: a Chrome side panel instead of another web app, and your calendar stays the source of truth.
It opens in the browser side panel next to whatever you're doing. No separate app, no new tab to keep open, no mobile account to manage.
Drag an event in Google Calendar and the assistant pins it. Delete one and the task returns to the queue. You don't have to learn a second calendar.
Placement is done by a constraint solver, not a language model guessing. The same inputs always give the same plan, and it explains what moved after every solve.
Each task says where it may go: work hours, personal evenings and weekends, or any time. Errands stop landing in your focus blocks.
FAQ
Never. It only creates, moves and deletes its own events, prefixed [AI].
It's marked at risk and the assistant tells you, offering the two real fixes: allow splitting into chunks, or move the deadline.
Start, end and title of events, used only to find free time. See the privacy policy.
Yes. It runs in Chrome's side panel and talks to Google Calendar through your Google sign-in. Full documentation is at flexcal.app/docs.
Your week, planned by an assistant that never gets tired of replanning it.
Add FlexCal to Chrome