The best calendar apps for iOS and Android in 2025: Schedule your day or week so you never forget important meetings or appointments with these calendar apps. Sync your calendars with your work emails, other devices, and any useful apps you use. Easily find free time for relaxation and meetings outside of work.
The Best Calendar Apps for iOS and Android in 2025
1. Google Calendar
Automatic time zone synchronization
Unlimited calendars
Integrates with Trello, G Suite, and Gmail
Verdict: Google Calendar is the most popular mobile and cross-platform calendar for daily planning. It allows you to create multiple alternative calendars, share them with other users, and easily copy important events, dates, and task lists to other calendar apps.
The app adapts to all time zones and features automatic synchronization, which is great for people who often travel for work. Additionally, the calendar can integrate with Freedcamp, Trello, Gmail, G Suite, Asana, and Todoist.
To prevent confusion between records, Google Calendar has implemented color coding for multiple calendars, allowing you to have a work calendar and a personal calendar simultaneously without them conflicting.
2. Business Calendar 2
Custom calendar design
Over 20 unique themes
Allows adding useful widgets
Advanced task assignments
Verdict: Although Business Calendar 2 has a more complex interface, its use feels delightfully intuitive. It provides a great overview of your meetings and offers powerful tools for task planning, making it perhaps the best online calendar.
The app gives you complete control over the appearance of your calendar, offering more than 20 themes, including a dark theme, and the ability to enable additional tools like Day Pro, or add your company logo or family photo as a background. Other noteworthy features include integrated weather forecasts in daily view and seamless integration with Gmail.
The premium version allows you to create notifications for missed calls and set up more complex tasks (e.g., recurring tasks, subtasks, and priorities).
3. Microsoft Outlook Calendar
Cross-platform application
Meeting notifications can be sent to colleagues
Calendar can be edited as a team
Verdict: Microsoft Outlook Calendar is another widely used cross-platform application for businesses, schools, and universities. You can create events and notifications, send meeting invitations, view multiple calendars simultaneously, and sync your email, contacts, and notes.
The app allows you to share your final calendar with colleagues to notify them of upcoming work meetings and events. Group members can read and edit each other's calendars, controlling them in other scheduling apps like Google Calendar and Apple Calendar.
You also have the option to copy all records directly and import them into a calendar creation program for printing.
4. Apple Calendar
Voice notifications using Siri
Can be synced with all Apple devices
Can be synced with Siri
Allows travel time estimation
Verdict: Apple Calendar is a free built-in calendar app for iPhone and all other Apple devices. The calendar syncs instantly across all your devices and allows you to view your tasks on Macbook, iPhone, iPad, and even Apple Watch.
The unique feature of this calendar is its synchronization with the voice assistant Siri. You can ask her to add a new record for a meeting tomorrow or remind you of an important call you need to make. Note that this feature is only available on devices running iOS 9.0 and later.
Using the app is extremely intuitive. All you need to do to add a task is click the “plus” (+) icon, and then you can create a new event that can include a title, location, alert, note, and a list of invitees.
5. Any.do
Automatic geotagging
Intuitive organization
Short morning task lists
Automatic geotagging for each record
The premium version requires monthly payments
Verdict: Any.do Calendar is a simple and intuitive app for managing and organizing your daily tasks and task lists and notes on your smartphone or directly in your browser.
It can easily connect to your existing calendar apps so you can import events, and it uses color coding for different calendars and meetings to help you stay organized. Moreover, based on the event title, the app automatically adds contacts and geolocation data to the record description.
Other interesting features worth mentioning include location-based notifications, morning alerts that allow you to preview what you have planned for the day, and the ability to add travel time to any notification before the event.
6. Bordio
Management of personal and business tasks
Beautiful visual design
Easy creation of task lists and to-do lists
Ability to create recurring tasks
Occasional issues with time tracking
Notifications may arrive late at times
Verdict: Bordio is an easy-to-use calendar app suitable for both individuals and teams. Everything is online, so you won't lose your tasks, and you can edit or move them whenever you want. Plus, you don't have to worry about how much space your notes take up – they can be as long as you need.
The standout feature is Bordio's to-do lists, which are perfect for capturing future ideas that don't fit into your weekly plans. These lists can be displayed in calendar view or hidden as needed.
The time-blocking system is another valuable tool, allowing you to reserve specific periods to focus on tasks. You can create multiple time blocks within a task and schedule them in the weeks leading up to the task's completion date. Experience task management seamlessly with Bordio.
7. TimeTree
7 sub-calendar types
Cross-platform
Great design
Complex controls
TimeTree calendar app logo
Verdict: TimeTree is a mobile calendar sharing app capable of handling any task. The app offers a unique approach by using separate calendars. Each sub-calendar has its own description so you can better understand its purpose.
For example, the relationship calendar is best suited for situations where you need to know someone's schedule as it is created for two people. The friends calendar allows commenting and discussing plans and events. Meanwhile, the work calendar allows for more precise descriptions and sharing with other members to notify them of meetings.
