10 Best Apps to Manage Multiple Calendars of 2026

Notion Calendar is the strongest free answer for people who want to see their work and personal calendars together. Notion's own FAQ says it integrates and syncs with Google Calendar accounts, Outlook Calendars and Apple iCloud-synced calendars, and the product page promises that it will auto-block busy slots across all your calendars, which is exactly the double booking problem most people with two jobs or a work and family split run into. It also ships scheduling links for sharing availability, a menu bar that lets you join the next meeting, side by side time zones, a command menu with keyboard shortcuts and iOS and Android widgets. Google Meet is available by default with Google Calendar, and Zoom meetings can be created inside the app. For Notion users, project timelines and database dates sit beside events and can be dragged to new dates. The limits: it is a calendar client rather than a sync service, so it offers fewer controls over what copies between calendars than OneCal or CalendarBridge.

OneCal tackles the multiple calendar problem from two sides at once. Its sync engine copies events between Google Calendar, Outlook, iCloud Calendar and CalDAV calendars in real time, one-way or multi-way, so a colleague who looks at your work calendar sees the dentist appointment you booked in iCloud as busy. Filters decide what crosses over: you can sync by title, color or category, RSVP status, or only during set hours, hide details behind private event controls, and skip all-day events, birthdays or out-of-office entries. The second half is the Unified Calendar View, which shows every connected calendar in one interface with drag and drop editing, RSVP, one-click meeting joins and multiple time zones, plus apps for iOS, Android and macOS. Every plan includes unlimited scheduling links and unlimited synced events. The limit is calendar count: Starter at $5 per user per month billed annually covers 2 calendars, Essential at $10 covers 5 and Premium at $25 covers 50.

Fantastical is the most capable calendar client on this list for someone who wants every account in one app rather than a sync service in the background. Flexibits says it works with Google, Microsoft 365, Exchange, iCloud, Todoist, CalDAV and more, and it runs on Mac, iPhone, iPad, Apple Watch, Apple Vision Pro, Windows and Googlebook. The feature that matters most for multiple calendars is Calendar Sets: you group calendars into sets such as Work and Home and switch between them, or let Focus Filters do it based on your device's Focus mode. Entry is fast, since you can type a sentence like lunch with Sarah at 1pm tomorrow or forward an email to create an event. Premium adds Openings for sharing availability, Proposals for meeting polls and automatic Google Meet, Zoom, Teams or Webex links. The catch is that Fantastical shows your calendars side by side but does not write busy blocks into your other accounts, so colleagues still cannot see your personal commitments.

CalendarBridge is built for people whose calendars belong to different organizations, such as a consultant with two client Microsoft 365 tenants and a personal Google account. When an event is created or changed on one calendar, CalendarBridge creates or updates a matching event on your other calendars, and you choose whether that copy is a plain busy block or carries full details. It works with Google Calendar, Microsoft 365, Outlook and iCloud. On top of sync it adds a Unified Calendar for viewing and editing everything in one place, scheduling pages and booking links that read your real availability, booking with payments and an AI scheduling assistant, plus a mobile app. The vendor lists SOC 2 Type 1 and 2 verification and HIPAA compliance, which matters for regulated clients. Pricing scales by calendar count: Basic costs $4 per month billed yearly for 2 calendars, Premium $8 for 5 and Pro $32 for 8.

Morgen treats multiple calendars as one input to a bigger daily plan. It connects Google Calendar, Outlook and Microsoft 365, iCloud and Fastmail with unlimited calendar and task integrations on every plan, and pulls tasks from tools such as Notion, Todoist, Linear, ClickUp and Microsoft To-Do. The AI Planner then suggests time blocks for those tasks around your meetings, and every plan includes calendar automations. A booking page and scheduling links share availability with outside people. Morgen runs on Windows, macOS, Linux, mobile and the browser, and the company says it stores data in Switzerland or the European Union. Pro costs $15 per month billed yearly or $30 billed monthly after a 14-day trial with no card, and the Team plan is $10 per seat per month billed yearly with a minimum of 2 seats. People who only want one view of their calendars will pay for planning tools they do not use.

Reclaim.ai is a scheduling assistant first and a multi-calendar tool second, but its Calendar Sync feature is one of the most practical answers to the work and personal split. It copies events between Google and Outlook calendars so your availability stays defended on every schedule, and on paid plans you get unlimited connected calendars and unlimited syncs with a 12 month range. Around that sit AI agents that schedule Focus Time, recurring Habits, Buffer Time after video calls and Smart Meetings that move recurring meetings when conflicts appear, plus Scheduling Links and task syncing with Todoist, Asana, ClickUp, Jira, Linear and Google Tasks. The free Lite plan is real: 1 Calendar Sync, 2 connected calendars and 1 Scheduling Link. Starter costs $10 per seat per month billed yearly or $12 monthly. The main gap for this audience is iCloud: Reclaim's pricing page lists Google and Outlook support only, so Apple calendar users need another tool.

SyncThemCalendars does one job: keep two or more calendars in step so nobody books you twice. You connect Google, Outlook or iCloud calendars, choose a source and a target, and the service copies every upcoming event, one way or both ways. A privacy option hides the title, description, location and other fields behind a simple Busy block, which is what most people want when a personal appointment lands on a work calendar. Every plan syncs unlimited events across unlimited calendars, and the vendor says setup takes about 2 minutes with no installs. Plans differ only by the number of syncs: Basic at $3.99 per month billed yearly ($47.88) includes 5, Premium at $7.99 includes 16 and Professional at $17.99 includes 36, all for 1 user and all with a 14-day free trial. There is no calendar app, booking page or task view, so it works best paired with whatever calendar app you already like.

For many people the work calendar already lives in Outlook, so adding personal accounts there is the path of least resistance. Microsoft says Outlook works with Exchange, Outlook.com, Gmail, Yahoo and iCloud accounts and keeps multiple accounts and calendars in one place, on the web, desktop and mobile. The free account includes the calendar, 15 GB of mailbox storage and web versions of the Office apps, and the mobile app can share your meeting availability with a tap. Microsoft 365 Basic, at $19.99 per year, makes Outlook ad-free, while Copilot features need a higher Microsoft 365 plan. What Outlook does not do is write your personal appointments into your work calendar as busy blocks, so coworkers booking you through Exchange still cannot see them. Treat it as a viewer for every account, and add Reclaim.ai, OneCal or SyncThemCalendars if you need availability to match across calendars.

Google Calendar is the right free tool when your calendars are all Google calendars: a personal Gmail account, a family calendar and a coworker's shared calendar can sit together under one login. When someone shares a calendar with you, it shows under Other calendars, and you control what others see with levels from free/busy only up to make changes and manage sharing, which lets you share a personal calendar with your work account without revealing details. For calendars outside Google, its help pages describe one route, adding a public calendar by link, and they state that you cannot subscribe to calendars that are not from Google otherwise. Subscribing also has to be done in a computer web browser, not in the Android or iOS app. That makes Google Calendar a solid hub for Google-only households but a weak one for someone with an Outlook work account and an iCloud family calendar, who will get more from Notion Calendar or a sync service.

Akiflow is for people whose real problem is not only several calendars but several task lists as well. Its pricing page lists Google Calendar sync and Outlook Calendar sync alongside a task inbox, subtasks, recurring tasks, labels, time blocking and availability sharing, so you can see a work Outlook calendar and a personal Google calendar together and drag tasks into the gaps. Pro also includes the Aki AI assistant and an MCP Connector, plus Zapier and IFTTT automations, productivity analytics and desktop and mobile apps. The cost is the highest on this list for an individual: Pro runs $19 per month billed yearly or $34 billed monthly, after a 7-day free trial, and there is no free plan. iCloud calendar sync is not listed among its features, so Apple calendar users should check before paying. For someone who only wants calendars in one view, Notion Calendar or OneCal costs far less.