How to keep a shared family calendar without double-booking
The short answerDouble-booking happens when a family's plans live in calendars that never talk to each other. A single shared calendar, colour-coded per person and editable by everyone, fixes it. Plannie connects each parent's Google or Outlook account with sync-back always on, and keeps Apple Calendar visible even though Apple only allows a one-way link.
Why do two versions of the same week keep happening?
Because each parent’s calendar only shows what they typed into it themselves. One parent books a dentist appointment from a work calendar, the other plans a birthday party from a text thread, and neither shows up in the other’s view until the two plans collide on the same Saturday morning. Add a teenager with their own school and club calendar, and a household ends up juggling several calendars that were never built to talk to each other. A shared calendar closes the gap between the ones that already exist, so the family doesn’t end up with one more calendar on the pile.
What actually stops a clash?
Three things being true at the same time: everyone can see the same calendar, everyone can edit it from wherever they already are, and it updates in real time rather than whenever someone next remembers to check. Plannie is built around that: a colour-coded household calendar where every member’s events, synced in from their own account, land in one shared view the moment they’re added, whether that happens from a phone in the school pickup line or from a tablet on the kitchen wall. See how the calendar tab itself works for the day, week, 4-day, month and list views this runs on. What catches a clash before it happens is seeing every event in the same place where someone’s about to add a new one.
Which calendars actually connect, and how deeply?
Google and Outlook/Microsoft 365 connect two-way; Apple/iCloud and any other public calendar link connect one-way only. The difference comes down to what each provider opens up to outside apps. Google and Microsoft both expose a real calendar API that a household member signs into, so Plannie can create, edit and delete events on their behalf rather than just read what’s already there, per Microsoft’s own Outlook calendar API documentation. Apple has never published an equivalent API for iCloud calendars, so the only way in is the same subscription mechanism anyone uses to follow a public calendar: point Plannie at a published web address and it pulls in updates on a refresh schedule, the way Apple’s own instructions for subscribing to a calendar describe. The table below lines up all four.
| Calendar source | How it connects | Sync direction | What happens to an edit made in Plannie |
|---|---|---|---|
| Sign in with the member’s Google account | Two-way, always on | Pushed to Google Calendar automatically, no separate toggle | |
| Outlook / Microsoft 365 | Sign in with the member’s Microsoft account, via Microsoft Graph | Two-way, always on | Pushed to Outlook automatically, no separate toggle |
| Apple / iCloud (ICS) | Subscribe to a published iCloud calendar link | One-way, read-only | Stays in Plannie only, never reaches Apple Calendar |
| Any other ICS feed | Subscribe to a published web address, e.g. a school or club calendar | One-way, read-only | Stays in Plannie only, since a generic feed has no path back to its source |
What happens to an event created in Plannie?
For Google and Outlook, it’s pushed straight to that member’s real calendar without any extra step. Two-way sync-back is always on for every connected Google and Outlook calendar now, so an event added, edited or deleted in Plannie shows up the same way in the connected app, and the reverse holds too: delete it in Google Calendar and it disappears from Plannie as well. Each member can also set a default calendar for their own profile, so assigning them to an event auto-syncs a copy there without picking a calendar by hand every time, and the event form’s own calendar picker can still override that default for a one-off. Full mechanics, including connecting several accounts per provider and what a broken connection looks like, are in the calendar sync help article.
Why does Apple work differently?
Because a subscribed calendar only ever flows one way. That’s how calendar subscriptions are designed, and it isn’t a Plannie limitation. Microsoft’s own explanation of viewing a Google Calendar inside Outlook makes the same point from the other direction: importing or subscribing gives a copy of the events, and per Microsoft’s support page on the subject, that copy doesn’t accept edits pushed back to the source, the same one-way shape Apple’s subscription mechanism uses. That’s why Apple/iCloud events appear correctly inside Plannie, colour-coded like everything else, but an edit made to that event in Plannie stays inside Plannie instead of reaching Apple Calendar. In practice, it means the Apple-using half of a household still makes changes to those events on the Apple side.
How does a co-parent in a second household fit in?
The same way any other member does: connected to the same shared calendar with their own colour, rather than left comparing two separate ones. A step-parent, grandparent or co-parent living somewhere else connects their own Google or Outlook account exactly like anyone under the primary roof, and their events land in the same colour-coded view without anyone re-typing a custody schedule by hand. For a household that wants a co-parent to see when someone’s busy without seeing what the event actually is, an eye button next to each connected Google or Outlook calendar flips it to busy-only for everyone but its owner, showing just a coloured time block with no title, location or notes. That’s covered alongside the rest of connecting a calendar in the same calendar sync article.
What do you do when someone still forgets to add something?
Forward it instead of retyping it. A photo of a soccer schedule, a school PDF, or a forwarded email sent to the household’s own Plannie email address gets read automatically and filed under the right person and time, so a paper flyer stuck to the fridge doesn’t become the one calendar nobody else can see. See how the family inbox handles this for what it does with attachments and how approving a new sender works.
How long does setup actually take?
About ten minutes for a typical two-parent household, most of it spent signing into calendar accounts rather than configuring anything.
- Create your household and add each family member with their own colour.
- Under Settings → Family & access → a member → Sync & calendars → Connect a calendar, connect each adult’s Google or Outlook account (or subscribe to an Apple Calendar or other ICS feed).
- Mount a tablet on the kitchen wall, or just open Plannie in any browser. See how to set up a kitchen tablet as a family calendar for that step.
The shared calendar is already populated with everyone’s existing events by the time step 2 is done; the tablet is optional.
Frequently asked
Do both parents need the same calendar app?+
No. Each parent connects their own Google or Outlook calendar to the same Plannie household, and every change syncs both ways. Nobody has to switch apps or manually copy events.
What if someone still forgets to add something?+
Forward the email, PDF or photo to the household's Plannie email address and the Assistant files it under the right person and time. Nobody has to type it in.
Can a co-parent in a second household see the same calendar?+
Yes. They connect their own Google or Outlook account to the same Plannie household exactly like a parent under the same roof, and their events show up in the same colour-coded view without anyone maintaining two separate schedules by hand.