9 best calendar apps for Android in 2026

Google Calendar is the best calendar app for Android for most users in 2026. It is free, deeply integrated with the Android ecosystem, and handles scheduling, sharing, and recurring events without friction. For Samsung device owners, Samsung Calendar offers a strong pre-installed alternative. For privacy, Proton Calendar leads with end-to-end encryption.

We tested nine calendar apps on Android, evaluating scheduling speed, widget quality, sync reliability, privacy, and task integration. Below, you will find detailed breakdowns with pros, cons, and the right pick for each use case.

The best calendar apps for Android at a glance

How we evaluated these calendar apps

We tested each app on a Pixel phone and a Samsung Galaxy running Android 14+, focusing on five criteria:

• Scheduling speed: How quickly can you create, edit, and move events? Does the app support quick-add or templates?
• Widgets: Home screen widget quality, information density, and customization. Android users rely on widgets more than any other platform.
• Sync reliability: Does the app handle Google Calendar, Microsoft Exchange, and CalDAV accounts without issues?
• Notifications: Reminder accuracy, multiple alerts, and "don't miss it" options.
• Workflow fit: Does it integrate with tasks, planning tools, or team calendars?

Android powers roughly 72% of mobile devices worldwide (StatCounter, 2025). Choosing the right calendar app affects how millions of people plan their days.

Pricing was verified in April 2026.

1. Google Calendar: best for most Android users

Google Calendar comes pre-installed on most Android phones and remains the default recommendation for a reason. It is fast, familiar, and deeply connected to Gmail, Google Meet, and Google Tasks. Events from email confirmations appear automatically, calendar sharing is simple, and it handles personal, team, and family calendars without extra configuration.

Why choose Google Calendar?

Google Calendar works on every Android device and syncs instantly across phones, tablets, and the web. Shared calendars, scheduling suggestions, and availability views make team coordination straightforward. The home screen widget shows your next events at a glance, and Material You theming matches your device's color palette.

For Android users who also plan projects or tasks in Notion, 2sync keeps Google Calendar and a Notion database aligned in both directions. Events created in either place appear in the other automatically.

✅ Pros:

• Free with no paid tier for personal use
• Best-in-class sharing, availability, and team scheduling
• Automatic event detection from Gmail (flights, reservations, appointments)
• Strong Wear OS and widget support

❌ Cons:

• Privacy depends on Google account settings and data practices
• Limited view customization compared to power-calendar apps
• Some business features require a paid Workspace plan

Related: How to share a Google Calendar | Google Calendar vs. Apple Calendar

2. Samsung Calendar: best for Samsung devices

Samsung Calendar is the default calendar on every Galaxy phone and tablet. It syncs with Google Calendar, Outlook, and Samsung accounts out of the box, supports S Pen input on Note and Ultra devices, and integrates with Samsung Reminders, Samsung Notes, and Galaxy Watch. If you own a Samsung device, it is already on your phone and worth trying before installing anything else.

Why choose Samsung Calendar?

Samsung Calendar is optimized for One UI, Samsung's Android skin. It loads faster than third-party apps on Galaxy devices, supports sticker-based event decoration, and offers a combined month + agenda view that shows your schedule without switching screens. The Galaxy Watch integration syncs events and reminders to your wrist without a separate app.

With roughly one in five smartphones sold worldwide being a Samsung device (Counterpoint, 2025), Samsung Calendar serves a massive user base that often overlooks it in favor of Google Calendar.

✅ Pros:

• Pre-installed on all Galaxy devices with no setup needed
• Optimized for One UI with fast performance
• S Pen support for handwritten notes on events
• Syncs with Google, Outlook, and Samsung accounts

❌ Cons:

• Only available on Samsung Galaxy devices
• Fewer third-party integrations than Google Calendar
• No web version or cross-platform support

3. Outlook Calendar: best for Microsoft 365 users

Outlook Calendar is the natural choice if your workplace runs on Microsoft 365 or Exchange. It combines email, calendar, and contacts in a single Android app, handles meeting invites smoothly, and keeps your work schedule accessible alongside your inbox.

Why choose Outlook Calendar?

Outlook handles complex scheduling scenarios that simpler calendars struggle with: recurring meetings with exceptions, room booking, and delegate access. Integration with Teams, SharePoint, and OneDrive keeps meeting notes, files, and calendar events connected. The Android app supports shared team calendars and multiple accounts, so you can manage work and personal schedules in one place.

For Android users who plan in Notion but manage their work schedule in Outlook, 2sync syncs Outlook Calendar with a Notion database so changes in either app update the other automatically.

✅ Pros:

• Best integration with Microsoft 365, Exchange, and Teams
• Email, calendar, and contacts in one app
• Robust meeting scheduling with room and resource booking
• Supports multiple accounts (work + personal)

❌ Cons:

• Heavier app than dedicated calendar-only alternatives
• Full features require a Microsoft 365 subscription
• Less intuitive for simple personal scheduling

Related: Best planner apps in 2026

4. Notion Calendar: best for Notion users

Notion Calendar is a free calendar app for people who already use Notion as their main workspace. It pulls events from Google Calendar and iCloud, then lets you link them to Notion pages and databases directly from the calendar view. Time-blocking tasks from a Notion database into your calendar takes a single tap.

Why choose Notion Calendar?

If Notion is your main workspace for projects, notes, and tasks, Notion Calendar brings your schedule into the same environment on Android. You can open any linked Notion page from a calendar event, see database items as time blocks, and share scheduling links that check your availability automatically.

Notion Calendar shows your events alongside your workspace, but changes you make in Google Calendar do not update your Notion databases automatically. That requires a dedicated two-way sync. 2sync handles the data layer: it writes events into Notion database properties with field mapping, filters, and two-way updates. The two tools solve different problems and work well together.

✅ Pros:

• Completely free with no paid tier
• Deep Notion workspace integration with time-blocking
• Available on Android, iOS, Mac, Windows, and web
• Built-in scheduling links

❌ Cons:

• Requires a Notion account to use
• No Outlook calendar support
• Limited standalone value without Notion

Related: 2sync vs. Notion Calendar | Best Notion calendar templates

5. Proton Calendar: best for privacy

Proton Calendar is the only option on this list with end-to-end encryption for all events. Even Proton's servers cannot read your calendar data. If your schedule contains sensitive client meetings, medical appointments, or confidential business events, Proton Calendar keeps that information private by design.

Why choose Proton Calendar?

Proton Calendar is part of the Proton privacy suite, which also includes Proton Mail, Proton Drive, and Proton VPN. The free plan includes full Calendar access with three calendars. Paid plans add more calendars, storage, and features across the Proton ecosystem. The Android app includes a home screen widget and supports dark mode.

Unlike Google Calendar, Proton does not use your calendar data for advertising or profiling. For users who prioritize data sovereignty, this is the strongest Android option available.

✅ Pros:

• End-to-end encryption for all calendar events
• Free plan includes full Calendar functionality
• Part of a broader privacy suite (Mail, Drive, VPN)
• Open-source and independently audited

❌ Cons:

• Cannot connect external calendars (Google, Outlook) directly
• Fewer collaboration features than mainstream calendar apps
• Smaller feature set than Google Calendar or Outlook

6. aCalendar: best for customization

aCalendar is a traditional power-calendar for Android users who want more control over how their schedule looks and behaves. It offers detailed agenda, week, month, and year views, strong readability options, and the kind of fine-grained display customization that helps your calendar match how you think.

Why choose aCalendar?

aCalendar lets you adjust almost every visual element: font sizes, color schemes, event display density, and widget layout. The one-time purchase model means no subscription, and the app works offline with locally cached events. For users who find Google Calendar too rigid in its visual options, aCalendar fills the gap.

✅ Pros:

• Highly customizable views and display settings
• Strong widget support with multiple layout options
• One-time purchase with no subscription
• Flexible recurrence rules and fine-grained calendar controls

❌ Cons:

• More settings than most users need, so initial setup takes time
• Android-only with no web or desktop companion
• Not designed for team collaboration

7. Business Calendar 2: best for widgets and agenda views

Business Calendar 2 is built for Android users who rely on their calendar widget as much as the app itself. Its home screen widgets display dense scheduling information, and the in-app views offer agenda, day, week, and month layouts with drag-and-drop event management.

Why choose Business Calendar 2?

The widget system is the main draw. Business Calendar 2 offers multiple widget sizes with configurable information density, so you can see your entire day or week from the home screen without opening the app. The Pro version adds templates, event colors, and task integration.

✅ Pros:

• Best-in-class home screen widgets for Android
• Dense agenda and week views for information-heavy schedules
• Drag-and-drop event management
• One-time purchase with no subscription

❌ Cons:

• Best features require the Pro purchase
• Collaboration depends on your calendar provider (Google/Exchange), not the app
• Steeper learning curve than simpler alternatives

8. Any.do: best for tasks and calendar together

Any.do combines a calendar with a task manager in a single app. The daily planner view shows your calendar events alongside your to-do list, so you can work through the day without switching between a calendar app and a separate task app.

Why choose Any.do?

If your biggest friction is juggling events and tasks across two apps, Any.do eliminates the split. Recurring tasks, location-based reminders, and shared lists sit next to your calendar events. The daily planner view is especially useful for "what's next?" execution throughout the day.

✅ Pros:

• Daily planner view merges calendar events with tasks
• Strong task features: recurring tasks, reminders, shared lists
• Clean interface that reduces context-switching
• Available on Android, iOS, and web

❌ Cons:

• Less powerful as a calendar-only experience
• Some features and integrations require Premium
• No desktop app (web only outside mobile)

Related: Best to-do list apps in 2026

9. TimeTree: best for sharing

TimeTree is built around shared schedules. It is designed for families, couples, roommates, and small teams who need to coordinate day-to-day logistics without setting up Google Workspace or Microsoft 365. Everyone can see and edit the same calendar, and event-based comments keep coordination details attached to the right event.

Why choose TimeTree?

TimeTree makes calendar sharing simple for non-technical users. You create a shared calendar, invite people by link, and everyone can add and comment on events. There are no permissions to configure and no admin setup. For family logistics, it is often easier than sharing a Google Calendar.

✅ Pros:

• Simplest shared calendar experience for families and groups
• Event-based comments for coordinating details in context
• No technical setup required for sharing
• Free tier covers most family and small-team needs

❌ Cons:

• Not suited for enterprise scheduling or complex permissions
• Premium features include ad removal and additional customization
• Less powerful as a standalone personal calendar

Best Android calendar widgets

Android's widget system is one of its biggest advantages over iOS for calendar users. The best calendar widgets let you see your schedule from the home screen without opening an app.

If widgets are your primary way of checking your schedule, Business Calendar 2 and aCalendar offer the most customization. Google Calendar's widget is solid for most users, and Samsung Calendar's widget feels native on Galaxy devices.

How to keep your Android calendar and planning tool in sync

Choosing the right calendar app for your Android phone solves half the problem. The other half is keeping your calendar consistent with wherever you plan your work.

If your projects, tasks, or deadlines are tracked in Notion but your day runs inside Google Calendar or Outlook on your phone, dates drift apart. You create an event in one place, forget to update the other, and end up with double entries or missed deadlines.

A two-way sync eliminates this. When you change a date in Notion, the calendar updates. When you reschedule a meeting in Google Calendar, the Notion database reflects it automatically.

Start with the guide: How to sync Notion with Google Calendar. You can also sync Google Tasks into Notion.

Which Android calendar app should you choose?

The right calendar depends on how you use your phone:

• You want the simplest, most reliable option: Google Calendar. Pre-installed, free, and deeply integrated with Android.
• You own a Samsung Galaxy device: Samsung Calendar. Optimized for One UI with S Pen and Galaxy Watch support.
• Your workplace uses Microsoft 365: Outlook Calendar. Email, calendar, and Teams in one app.
• Notion is your main workspace: Notion Calendar. Free, with deep Notion integration and time-blocking.
• Privacy is your top priority: Proton Calendar. End-to-end encryption for all events.
• You want full visual control: aCalendar. Customizable views, colors, and widget layouts.
• You rely on home screen widgets: Business Calendar 2. The densest, most configurable widgets available.
• You need tasks and calendar in one app: Any.do. Daily planner that merges events with to-dos.
• You coordinate with family or roommates: TimeTree. The simplest shared calendar experience.

Related: 10 best calendar apps in 2026 | 9 best calendar apps for Mac | Best free online planners

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