Calends
Calends isn't a standalone calendar app. It builds one master calendar right inside the Apple Calendar you already use, folding many of your calendars into a single one to keep for yourself on every device or share with anyone. Here's how it works.
Open Calends and tap the + button to create a master calendar, a real calendar that lives inside Apple Calendar. Name it and give it a color.
Tap the new master and check which of your existing calendars should flow into it, iCloud, work accounts, school feeds, anything Apple Calendar can see.
Within a minute, the master is populated with events from those sources, deduplicated, filtered, and kept current in the background.
It's already on all your devices through iCloud. To share, send it from Apple's Calendar app the same way you'd share any calendar.
Not one you have to live in. Calends builds and updates your master calendar, but the master itself is an ordinary calendar right inside Apple Calendar, so you keep using Apple's Calendar app (or Outlook, or Google) exactly as you do now. You only open Calends to create a master or change what feeds it; the rest happens quietly in the background.
In your normal iCloud calendars. Calends doesn't move them. It writes copies into the master calendar you create, which is itself a regular calendar right inside Apple Calendar. Your original events are never touched.
You can, but we recommend editing the source. Edits to source events flow through to the master automatically. Edits to master events stay there but don't propagate back.
The master is removed from your devices. Your source calendars and all the events in them are untouched.
Calends syncs your master calendar settings through your private iCloud account. The events themselves live in regular iCloud calendars, which Apple syncs as usual. Only one device runs the active sync engine at a time, if you see a banner saying "Sync is running on [another device]," tap "Take over here" to switch.
Two reasons, both quiet. During the free trial, Calends schedules a few reminders on the device itself so the trial never ends by surprise. And if a calendar ever needs your attention, say a work account signs out on the Mac that keeps your masters current, your other devices get a short notification naming the calendar and the device, so a problem on the Mac at home doesn't wait until you're back at it.
Those alerts travel through your own iCloud account and Apple's notification service. They carry the calendar's name and a one-line status, never event details, and Calends has no server of its own to send anything to. If you decline, Calends simply stays quiet and shows anything that needs you inside the app instead.
Nothing to do. When a source calendar is renamed, Calends follows: the master keeps filling as before, and the calendar's settings, its detail level, busy label, and keyword filters, move to the new name automatically. To rename a master, do it in Calends rather than Apple Calendar, so every device follows along.
On the device where you tick a calendar, Calends uses exactly that one, so two calendars with the identical name (a work Calendar, or a Holidays or Birthdays feed that appears in more than one account) are no longer mixed up. One nuance: a calendar's identifier is specific to each device, so that exact match applies only where you made the pick, on your other devices, tick the right one there too. To fix it everywhere at once, give one a distinct name in Apple Calendar; best done on a Mac, since iPhone and iPad usually won't let you rename a work (Exchange) calendar.
Calends lists every calendar a master is built from, including any the device in your hand can't read. Those appear without a tick box, with a note saying either which device does read it, or that nothing currently can. The master itself is fine: the device that can read the calendar keeps it up to date, and the merged result reaches your other devices through iCloud as usual. Four things cause it.
The calendar lives on one Mac instead of in iCloud. The most common cause and the easiest to fix. A calendar created under "On My Mac" exists only on that Mac and never syncs anywhere. In Apple Calendar on that Mac, create a new calendar under your iCloud account, drag the events into it, and use that as the source instead.
The account isn't set up on that device. A work or school account you added on your Mac but not on your iPhone, for instance. Add it there too if you want that device to read it, or just leave things as they are and let the Mac keep the master current.
Your employer's device management hides it. If a work account was installed on your iPhone by your employer rather than by you, iOS hides that account from every third-party app, Calends included. No app can work around it, though there are still ways to get the calendar onto your phone. Full explanation here.
The calendar was deleted. Then nothing can read it, and Calends offers a Remove button so the master can tidy itself up. That button only appears once no device has read the calendar for some time, so a work calendar that simply isn't visible on your phone is never offered for removal there.
The one-time purchase includes Family Sharing. Anyone in your Family Sharing group can install Calends from their own Apple ID and get the same access, no extra purchase.
Calends works through Apple's built-in Calendar app, but you don't have to switch to it. Your work or Google account can live in Apple Calendar and in Outlook or Google at the same time; adding it to Apple Calendar is a quick, free step (iPhone/iPad: Settings → Calendar → Accounts; Mac: System Settings → Internet Accounts) and removes it from nowhere else. Many people add Apple Calendar just to use Calends.
iPhone, iPad, and Mac. Requires iOS 17 / iPadOS 17 / macOS 14 or later.
Refunds are handled by Apple. Use the "Report a Problem" link in your Apple ID purchase history at reportaproblem.apple.com.
We usually reply within a day. Tell us your device and what you were doing, and we'll sort it out.