Most "best shared calendar" lists are written by apps that want you to download them, and they all conclude the same thing. This one names a competitor as the top pick, because for a general couple that's the honest answer.
Here's what actually separates them.
The short version
| Feature | Free tier | Paid | Syncs with | Built for |
|---|---|---|---|---|
| Cupla | All features, limited time window | Premium (full window) | Google, Apple, Outlook, two-way | Exactly two people |
| TimeTree | Multiple calendars, sharing, comments, photos, imports | $4.49/mo or $44.99/yr | Calendar import | Any group |
| Cozi | Full calendar, ad-supported | Gold, $39 | Varies | Families of 3+ |
| Google Calendar | Everything | Free | Everything | Anyone already in Google |
| BoardSpy | 1 rotation, 1 shared calendar, 2 people including you | Basic $2/mo · Pro $5/mo · $50/yr · $100 once | Google (read-only mirror), Apple on iOS for alarms | Couples where someone works shifts |
Prices checked 15 October 2026 against each vendor's own pages, linked in the sections below. TimeTree's figures come from its 2022 pricing announcement, which is the most recent statement on its own site — worth confirming in the app before you pay.
Cupla — the best pick for most couples
Cupla is the only app here designed for two people and nothing else. That constraint is the point: there's no family-of-six mode to navigate past, and no "invite your team" flow.
Everything is free. Cupla's own facts page says all features are available on the free tier, with Premium unlocking the full viewable time window rather than gating features behind a paywall. You get a shared calendar, shared to-dos, a date planner, key dates and shared wishlists.
The sync is the strong part: two-way with Google Calendar, Apple Calendar and Microsoft Outlook. Two-way matters more than it sounds. Plenty of apps will read your Google calendar and show it to your partner; far fewer will write back, so an event created in the shared app actually lands in the calendar you already check.
It runs on iOS and Android, with a web app in beta since May 2026.
Who it's not for: anyone who needs a third person in the calendar. Cupla connects two partners by design.
TimeTree — best if you want several shared calendars
TimeTree is the generalist. You can run more than one shared calendar at once, which is genuinely useful if you want one calendar with your partner and another with, say, your siblings or a group of friends.
TimeTree's support page says the core features cost nothing: creating and sharing calendars, running several of them, comments and photos on events, importing other calendars, and public calendars.
Premium is $4.49 a month or $44.99 a year as announced in April 2022. What it buys is mostly ad removal and dedicated support, with search and richer event views listed as planned additions. If ads don't bother you, the free tier is unusually complete.
Who it's not for: anyone who wants the calendar to actively tell them when to leave. TimeTree shows you the plan; it doesn't drive it.
Cozi — best if the household is bigger than two
Cozi isn't really a couples app, and it shouldn't be judged as one. It's a family organiser: calendar plus shopping lists, meal planning and to-dos, with colour-coded members.
The free version is ad-supported. Cozi Gold is $39 and removes ads, adds month view on mobile, calendar search, up to three reminders per event, change notifications, a birthday tracker and shopping mode. Cozi's page doesn't state a cap on family members.
If you're two people who will stay two people, Cozi is more app than you need. If there are kids, or there will be, this is the one on the list that scales.
Google Calendar — the one you already have
Worth saying plainly: if you and your partner are both already in Google, sharing a calendar with each other is free and takes about a minute. No new app, no new login, and it syncs to everything.
What you give up is anything built for two people specifically — shared to-dos, date planning, a view designed around "what are we both doing this week". You're sharing a work calendar and hoping it does a relationship job.
For a lot of couples that's genuinely enough, and we'd rather say so than pretend otherwise.
BoardSpy — best if one of you works shifts
This is ours, so here's the honest version.
The limit first: the free shared calendar holds 2 people, including you. If you need a third — a grandparent, a babysitter, a co-parent — that needs Pro. That's a real constraint and you should know it before you install, not after you try to invite someone.
What nothing else here does: the alarm is timed to live traffic on the actual route. Every other app on this list rings at a time you picked. BoardSpy asks Google Maps how long the drive is right now and rings at the shift start minus the drive time minus a five-minute buffer, so the leave-by time moves with the road. The lead time you set is only the fallback for when there's no drive time available.
The second thing: shift rotations are built in, by name. DuPont, Panama, 2-2-3 / Pitman, 4 on 4 off, 4 on 4 off rotating, D-D-N-N-O-O, 5-2, 24/48 and 48/96. Tap your pattern, set your start date, and it fills the next 120 days. There's a Kelly-day field for firefighters — every Nth working shift off, 2 to 30. You can also paint a custom cycle up to 56 days.
Pricing: Basic is $2/month and unlocks unlimited calendar alarms, but it's still two people. Pro is $5/month, $50/year or $100 once, and that's what adds the third member, more rotations, phone-calendar export and the lock-screen countdown. After the seven-day trial, a free account keeps the calendar but the alarms stop.
Who it's not for: a couple with ordinary nine-to-five jobs who just want to see each other's week. Use Cupla.
What actually matters when you pick one
Three things decide this, and feature lists mostly obscure them.
How many people can be on the free tier. This is the one that bites later, because you don't find out until you try to add someone. Cupla is two by design. BoardSpy is two including you. Cozi and TimeTree don't publish a cap.
Whether the sync writes back. One-way sync means the shared app can show you what's in your Google calendar, but an event you create in the app never reaches the calendar you actually open in the morning. Two-way means it does. Cupla is two-way with Google, Apple and Outlook. BoardSpy's Google mirror is read-only, and on iPhone Apple Calendar is used for alarms rather than mirrored.
Whether it reminds you or just displays. Most of these are a shared view. If the problem you're solving is "we both forget", a display doesn't fix it — you want something that pushes.
If one of you works shifts
This is the case that breaks ordinary shared calendars, and it's worth separating out.
A fixed rotation isn't a weekly pattern, so copying it into a normal calendar means typing it in every month, or building a repeat rule that doesn't quite fit and drifts. A 2-2-3 is a fourteen-day cycle. A DuPont is twenty-eight days. Neither lines up with a week, which is the only unit most calendar apps repeat on.
Then there's the drive. A shift that starts at 3pm means leaving into the afternoon build-up; one that ends at 7am means driving home through the morning peak. The same route takes very different amounts of time depending on which it is, so a fixed alarm is wrong most of the week.
That's the gap BoardSpy was built for, and it's why we'd point a general couple at Cupla instead. Different problems.
Also worth knowing: OurCal ranks for these searches too. It's not in the table because we couldn't verify its current terms from its own site, and we'd rather leave it out than guess.
Frequently asked questions
What is the best shared calendar app for couples?
For most couples, Cupla — it's built for exactly two people, every feature is on the free tier, and it syncs two ways with Google, Apple and Outlook. TimeTree is better if you want several shared calendars, Cozi if the household is larger than two, and BoardSpy if one of you works a shift rotation.
Is there a free shared calendar app for couples?
Yes, several. Cupla's full feature set is free with a limited viewable time window. TimeTree's core features — creating and sharing calendars, comments, photos and imports — cost nothing. Cozi's calendar is free with ads. Google Calendar is free outright. BoardSpy's free tier covers one shared calendar for two people including you.
Can my partner and I share a calendar without both having iPhones?
Yes. Cupla, TimeTree, Cozi and BoardSpy all run on both iOS and Android, so a mixed-phone couple is fine. Sharing an Apple Calendar directly is the option that needs both of you on Apple devices.
What happens when we want to add a third person?
It depends on the app. Cupla connects two partners by design, so a third person isn't the use case. BoardSpy's free shared calendar holds two people including you; a third requires Pro. Cozi is built for larger households and doesn't publish a member cap.
Will a shared calendar tell us when to leave?
Most won't. Cupla, TimeTree, Cozi and Google Calendar show you what's scheduled and can remind you at a time you pick. BoardSpy times the alarm to live traffic on the route — the drive time right now plus a five-minute buffer — so the leave-by time changes with the road rather than staying fixed.
Does a shared calendar app work for shift work?
Only if it understands rotations. A 2-2-3 repeats every fourteen days and a DuPont every twenty-eight, so neither fits a weekly repeat rule, which is what most calendar apps offer. BoardSpy ships named presets for the common rotations and fills 120 days ahead from a start date.