What is in this guide
Pick one app as the master calendar, give both parents editing access at the same permission level, and agree what counts as “on the calendar” before you add a single event. The app matters less than the rule that only one calendar is real and both of you actually open it.
Most households already have Google Calendar, Apple’s Family Sharing or a dedicated family app such as Cozi available for free. The setup below works with any of the three. What changes between them is how permissions and family membership work, not the basic idea of one shared, editable calendar.
1. Compare the three common options before you choose
If you are not already committed to one ecosystem, these are the usual starting points for two parents on separate phones.
| App | What it gives you | Worth knowing |
|---|---|---|
| Google Calendar | Share a specific calendar with another person and choose their permission level, from free/busy only up to full editing and sharing control | Works across Android and iPhone; good if one parent is not on an iPhone |
| Apple Family Sharing | The organiser invites up to five other family members and can turn on a shared calendar as one of the group’s shared features | Ties into an Apple Family group, so it suits households already on iPhone and iPad |
| Cozi | A shared calendar with a colour per family member, plus shared shopping and to-do lists, free to use, with a paid Cozi Gold tier for extras like month view and calendar search | Built specifically for family logistics rather than general scheduling |
If one parent uses Android and the other uses iPhone, Google Calendar avoids locking either of you out. If you are both on Apple devices already, Family Sharing adds a calendar without a new account. If you want shopping and to-do lists in the same place as the calendar, Cozi is built for that rather than bolted on.
2. Set the permission level, not just who has access
Being invited to a calendar is not the same as being able to use it properly. Check what level of access each parent actually has.
In Google Calendar specifically, you can share a calendar with someone and pick their exact permission, up to and including making changes and managing who else can see it. Give both parents the same level, usually full editing. A calendar one parent can only view becomes a calendar that parent stops checking.
For Apple Family Sharing, confirm the calendar is one of the features the organiser has switched on for the group. For Cozi, confirm both parents are logged into the same family account rather than two separate ones.
3. Give each person a colour and a naming rule
Assign one colour per parent and one per child if the app supports it. Use the same short format for every entry: who it is for, what it is, and where if that matters. “Mia, swimming, pool car park” reads faster than “swimming” with no owner.
Agree who adds school dates as they arrive, who adds work commitments, and who adds anything involving a third party such as a babysitter or grandparent. Without that rule, entries either get duplicated or missed, which is the usual complaint about shared calendars that otherwise work fine.
4. Decide what belongs on the calendar and what does not
A shared calendar holds commitments with a date and a time. It is not the place for a running conversation about who is tired or whose turn it is to cook. Keep those in whatever message thread you already use, and reserve the calendar for things either parent needs to see at a glance: pickups, appointments, work trips, and events that change the evening plan.
If your household already runs a physical family command centre or a printed weekly sheet, treat the digital calendar as the one place that holds the complete, current version. The paper copy becomes a snapshot taken from it, not a second source of truth.
5. Agree how a change gets flagged
A new entry with no notification is easy to miss on a busy morning. Check whether your chosen app sends a notification or email for new or changed events, and turn that setting on for both parents rather than relying on either of you to open the app and scroll.
For a short-notice change, such as a cancelled pickup, add it to the calendar and still tell the other parent directly. The calendar is the record; it is not a substitute for the same kind of direct confirmation covered in the guide to a morning handover between two parents.
6. Review the calendar after a fortnight
After two weeks, check for the actual problems rather than assuming the setup failed. Common ones: one parent still checking a different calendar out of habit, events entered without an owner, or a bill due date that belongs on a separate bill calendar cluttering the family view instead.
Fix the specific habit rather than switching apps. Changing the tool rarely solves a rule that was never agreed in the first place.
How we checked this
Reviewed on 2 October 2026 directly against Google’s, Apple’s and Cozi’s own support and product pages for how sharing, family membership and permissions currently work in each app. The comparison, setup steps and review method are Dovelyne editorial suggestions, not a tested or ranked evaluation of the three apps.
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