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The best calendar apps for Android: in-depth comparison

27 mayo, 2021

The vast majority of Android phones come standard with the Google Calendar app pre-installed, although of course there is a whole world of calendar apps out there. In this article we will look for what is the best calendar app for android nowadays.

The calendar is one of the most universal productivity tools and in which each one has unique requirements and preferences. We will take that into account to dissect what each one offers and that you find the calendar that best suits your needs.

What do we ask of a calendar app


There are those who cannot live without the year view and there are those who always use the calendar view. In order to compare what each calendar application offers, we must take into account several common factors. In our comparison we will analyze these aspects of each application:

  • Calendar views. As a general rule, the more views a calendar app has, the better, as it is more likely to include the one you use frequently. The most common are the weekly and monthly, although some apps also include the annual or multi-day view.

  • Holidays and birthdays. Some calendar applications add local holidays to the calendar and the birthdays of your contacts on their own, without the need for them to be added to the mobile as an additional calendar.

  • Personalized reminders. When it’s time for an event, you probably want to know ahead of time. Some applications allow you to choose precisely when you want to receive that notification. Others, like Google Calendar, include their own section to create reminders.

  • Chores. Tasks and calendars are two closely related concepts, with the main difference that tasks are not always tied to a date and can be completed. It is common for calendar apps to include the tasks function, although it is not available in all.

  • Synchronization. All applications are synchronized with the calendars available on your mobile, although some can connect with other services on their own, as well as synchronize events on their own so that you can check them on other mobiles or on the web.

  • Widgets. All the applications in our comparison include at least one widget for the desktop, although some go a step further with various designs and different views, to better adapt to what you are looking for.

  • License. Our list is made up entirely of free calendar apps, although some offer all their features for nothing and others reserve a handful of them for paid versions.

Our selection of candidates

Taking into account all of the above, we have prepared our list with the seven best calendar apps of the moment. They are mostly specialized calendar applications, although we have also included Microsoft Outlook, being the spiritual heir to Sunrise Calendar, may you rest in peace.

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Google calendar

How could it be otherwise, we started with Google Calendar, the application to beat its competition, for the mere fact that it is pre-installed in the vast majority of occasions.


Google Calendar is a calendar application that is hard to find fault with. Its design was renewed relatively recently and it ticks practically all the boxes of what can be asked of an application of the style, except perhaps one: incomprehensibly, does not include homework. Despite the existence of Google Tasks.

Google Calendar stands out from the crowd by reusing Google’s muscle to integrate events from Gmail and add local holidays and birthdays of your contacts. Although it does not have tasks per se, it allows you to create reminders, which is something like simpler events.

Google calendar

Google calendar Calendar is a name that sounds strong when it comes to notes and tasks applications, although they also have their own calendar application. In Calendar is something like that as a notes app and calendar together in a single app.


The application has a pleasant design to the eye, although some will doubtless miss that the events are shown directly in the month view, something that is not available. As a calendar app, does not have as much depth of options as other alternatives , although in return he wins in other related functions. has some functions under its arm for its paid version (3.29 euros per month), although it also has interesting additions for its free users, such as a quick shortcut for create shopping list.

Calendar App - Google Calendar & Calendar Widget

Calendar App – Google Calendar & Calendar Widget

Microsoft Outlook

Microsoft Outlook is not a particularly light application (its latest version exceeds 270 Mb of storage), so it is not the lightest alternative if you are only interested in the calendar function and not the mail client. However, if you already use Microsoft Outlook on your mobile, its calendar section is an alternative to consider.


Microsoft bought Sunrise Calendar in 2015 and promised that its legacy would live on within Outlook. The years have passed, and to the Outlook calendar few drawbacks can be found, regardless of it being a tab within a larger application and not a separately accessible application.

Microsoft Outlook has its sights set somewhat more on the business audience, with synchronization with various services such as Evernote or Wonderlist. One point where you limp with respect to the competition is at the number of widgets available (only one) and in that at the moment the tasks are not shown as they do in Outlook for PC.

Microsoft Outlook

Microsoft Outlook


TimeTree is a calendar application somewhat less known than the previous ones. As best assets, it has a fairly clean design -similar to Google Calendar- and the possibility of share calendars with other people, including social functions like comments and “likes”.


Internally, TimeTree works a bit differently than other calendar applications. Here the calendar is not synchronized from the mobile as is, but you can import mobile calendars for use in the application, although the changes you make in TimeTree will not be visible from other applications.

The application has its own section for create notes (with an associated date or not) and that, like calendar events, can be shared with other people. At the moment it includes the holidays of 13 countries.

TimeTree - Free Shared Calendar

TimeTree – Free Shared Calendar

Business Calendar

Business Calendar is one of the most popular calendar apps on Google Play, with more than 5 million downloads and an average score of 4.6. Visually it is not a feast for the eyes, but instead includes lots of settings and customization options.


Business Calendar has a lot of everything, including types of views. You will find in him the coveted annual view (with different colors depending on how busy the day was), including holidays, birthdays, and week numbers. All this, being able to modify the final appearance to a large extent (although some of these options are limited in the free version).

In Business Calendar there are also space for homework, which can be associated with a location and with a personalized reminder. The widgets are also not lacking: there are seven in total, including with views of agenda, monthly, weekly and tasks.

Calendar Business Agenda ・ Organizer & Widget

Calendar Business Agenda ・ Organizer & Widget


ZenDay is one of the most curious calendar applications. Its main interest lies in its peculiar way of displaying the calendar: with a 3D view in which you can check your schedule in a way that you will not find in the competition.


ZenDay also has a more traditional way -in 2D- to display your calendar, although this mode is only available with the mobile in landscape and includes the monthly and weekly view. The most paradoxical thing about the matter is that, except for the futuristic 3D view, the rest of the application has a design more worthy of five years ago.

ZenDay does not show you holidays or birthdays, although it does have a task section (with a duration and custom actions). Other curious functions are the Coaching and Debriefing section, with statistics and information about your events.

ZenDay: Calendar, Tasks, To-do

ZenDay: Calendar, Tasks, To-do


We end our list with aCalendar, which has garnered more than 10 million downloads on Google Play. It has a nice design to the Material Design of a few years ago and includes the annual view that many users consider essential.


In aCalendar you will find an exclusive section to consult the birthdays and anniversaries, which show the contact’s photo and, like Business Calendar, stands out for having a large number of customization options. Some of them, yes, require buying the full version, for 3.99 euros.

The free version does not include holidays, although they can be added with an integrated purchase of 0.99 euros. Have eight widgets in total, all of them customizable both in their functions and in their design.

aCalendar - Android Calendar

aCalendar – Android Calendar

Comparison table

Then we leave you a full comparison table with the main features of all the calendar applications that we have included in our comparison, so that you can see at a glance which one best suits your needs.

Google calendar Calendar



Business Calendar




Agenda, day, 3 days, week and month

Agenda, day, 3 days and week

Agenda, day, 3 days and month

Summary, Weekly and Monthly

Agenda, day, week, month, year

3D (agenda) and 2D (week and month)

Agenda, day, week, month, year