Thendoo vs Google Calendar: a calendar, or a planner on top of it
Thendoo doesn't replace Google Calendar; it reads it and plans tasks, habits and bills around your meetings. See what each does and how they work together.
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The short answer
Google Calendar is the calendar: shared calendars, invitations, booking pages and apps on every platform. Thendoo is not a replacement for it. Thendoo connects to Google Calendar (read-only until you allow editing), shows your meetings on a Today timeline, and helps you fit tasks, habits and bills into the free time around them. Most people who try Thendoo keep Google Calendar and use both.
Side by side
What it is
- Google Calendar
- A shareable online calendar with events, invitations and multiple calendarssource
- Thendoo
- A day planner: tasks, habits, routines, focus timer and money around your meetings
Devices
- Google Calendar
- Web, Android and iOS apps, Wear OS and Apple Watchsource
- Thendoo
- Web app; add it to a phone's home screen. Native apps planned
Tasks
- Google Calendar
- Google Tasks with a date and time appear on the calendarsource
- Thendoo
- Full task manager: Spaces, Lists, subtasks, repeating tasks, estimates and a To schedule tray
Time blocks
- Google Calendar
- Create events by hand; focus time events on eligible Workspace planssource
- Thendoo
- Drag a task onto free time; optionally written to a separate 'Thendoo' calendar in Google
Booking pages
- Google Calendar
- Appointment schedules; one booking page on a personal account, more on Workspacesource
- Thendoo
- Booking links with meeting types, rules, confirmation and reminder emails
Sharing
- Google Calendar
- Shared calendars, invitations, working hours and locationsource
- Thendoo
- Single-user only
Habits, routines and money
- Google Calendar
- No habit tracker or budgetssource
- Thendoo
- Built in: When/Then habits, timed routines, budgets and bills on Today
Time insights
- Google Calendar
- Time Insights show how you spend your time and with whomsource
- Thendoo
- Insights: estimated against actual time per task for the week
Plans and prices
Our take
Choose Google Calendar if…
- You need to invite people, share calendars or book meeting rooms.
- You want your calendar on your phone and watch, with notifications.
- Meetings are most of your day and tasks live somewhere else.
Choose Thendoo if…
- You already use Google Calendar and want your tasks, habits and bills planned around it.
- You lose track of what fits in the gaps between meetings.
- You want time blocks in Google so colleagues see you're busy, without Thendoo touching your other calendars.
Not a rival, a layer on top
This page is a little different from our other comparisons. Google Calendar and Thendoo do different jobs, and Thendoo is designed to work with Google Calendar, not to replace it.
Google Calendar is where meetings live. It handles invitations, shared team calendars, rooms, booking pages, working hours and video calls. It runs on the web, on Android and iOS, and on watches, and it’s free with a personal Google account.
Thendoo is where the rest of your day gets a place. It connects to Google Calendar with read-only access at first (you can allow editing later), from one or several accounts, and shows your meetings on the Today timeline. Then it helps you place everything else: tasks from your lists and from ClickUp, your When/Then habits, timed routines and bills that are due soon. Free time is worked out from your real schedule, so you can see what actually fits.
How they work together
- Connect Google Calendar under Connections. Tick Show on Today for the calendars that matter and give each one a Space.
- Each morning, open Plan my day. Your meetings are already there. Drag tasks from the To schedule tray onto the gaps.
- If you want, turn on Show my time blocks in Google Calendar. Thendoo creates a separate “Thendoo” calendar in one account and writes your blocks only there, so colleagues see you’re busy. Your other calendars are never changed.
Thendoo syncs about every five minutes, and Sync now pulls changes right away.
Where Google Calendar alone is enough
If your day is mostly meetings, and your tasks fit in a short list, Google Calendar and Google Tasks may be all you need. Tasks with a date and time already show on the calendar.
Thendoo helps most when the gaps matter: a long task list, habits you’re building, bills you keep forgetting, or ADHD time blindness that makes a blank afternoon feel endless. Missed tasks become Carried over, never a red wall, and the plan for tomorrow starts fresh.
Other calendars
Thendoo can import an iCalendar (.ics) file today, for calendars you want to bring in as a one-time copy, such as an Apple Calendar export. Live Outlook and iCloud connections are candidates for a later phase and don’t work today.
Questions
Do I have to leave Google Calendar to use Thendoo?
No. Thendoo is built to sit on top of it. Keep sending and accepting invitations in Google Calendar; Thendoo reads your events and shows them on Today.
Can Thendoo change my Google events?
No. It reads your calendars only. If you turn on time blocks in Google Calendar, Thendoo creates a separate "Thendoo" calendar in one account and writes only there.
Can I connect more than one Google account?
Yes. You can connect several Google accounts and choose which calendars show on Today and which Space each belongs to.
Can I import an .ics file instead?
Yes. Open Settings → Import, choose Calendar file (.ics) and upload it. Thendoo makes a calendar for the file, with its events, repeating ones included, as a one-time copy you can undo for 30 days. To keep seeing changes from Google, connect Google Calendar instead.