5 Best Calendar Apps for Planning Your Schedule

By Maria Hills

Updated Oct 14, 2026Published Jan 25, 20216 min read

The best calendar apps for most people are Google Calendar (free, web, Android and iOS), iCloud Calendar (free, best for Apple users), Business Calendar 2 (an Android planner with widgets), Thunderbird’s built-in calendar (a free desktop app paired with email) and Calendly (scheduling links for booking meetings). Pick the one that matches your devices and email account.

Calendars are central to daily life: people rely on them to keep track of their days and evenings, their work and everything else on their schedule.

One survey cited when this article was first published reported that 70% of respondents rely on calendars to plan and schedule important events and activities; the survey’s publisher was not named, so the figure could not be independently confirmed. That survey reportedly covered 1,000 people aged 18 to 64 across the United States.

Best Calendar Apps to Improve Your Productivity

In a similar survey, also unnamed in the original article, 46.7% of respondents said they rely on their phone’s calendar app, while 23.3% said they rely on the calendar on their computer. Treat both figures as indicative rather than current.

Below are five widely used calendar apps that can help you organize your schedule, each with a different strength.

Google Calendar

Google Calendar is one of the best-known free calendar apps, developed by Google and available on the web, Android and iOS. It helps you manage your schedule with little effort, so you spend more time on your day and less time organizing it.

Google Calendar offers several views for your events, including day, week, month and schedule views, which can make a busy routine easier to read. The Schedule view lists upcoming events in order, so you can scan your plans at a glance.

iCloud Calendar

iCloud Calendar is a free calendar service for anyone with an Apple Account, and it is the natural choice for Mac, iPhone and iPad users. You don’t need to bother with any download or enlistment, if you have an Apple and iCloud ID, you can sign in to your record and effectively sync your Calendar with iCloud.

Whenever you use the Calendar app on your iPhone, iPad, iPod Touch, Mac or Windows PC with iCloud turned on, the updates appear directly in iCloud.

The same applies to any other changes you make to your calendar. You can also invite friends, colleagues or anyone else to events, and share whole calendars with them.

Business Calendar 2

Business Calendar 2 isn’t just a slick schedule application, yet it likewise incorporates widgets, tasks, and significantly more. Business Calendar 2 Planner, made by Appgenix Software, is an Android app that syncs with Google Calendar, Outlook Calendar, Exchange and CalDAV accounts and offers seven home-screen widgets.

It remains one of the more popular Android calendar apps for work and family planning, with more than 10 million downloads on Google Play as of October 2026. The free version contains ads, and in-app purchases unlock extra features.

Thunderbird Lightning

Lightning Calendar was an easy-to-use calendar add-on that records your life’s important events and works with Thunderbird or SeaMonkey email. Since Thunderbird 78 (2020), Lightning has been built into Thunderbird itself, so Thunderbird users no longer need a separate add-on.

You can create events, manage appointments, invite friends to events and more.

The calendar lets you build your schedule wherever you use Thunderbird. You can manage all of your calendars inside Thunderbird. Lightning Calendar is more than a simple schedule planner, because it sits alongside your email.

Calendly

Calendly is an easy-to-use scheduling app that organizes your meetings and events without long back-and-forth email threads. It reads the availability preferences you set and handles the rest of the booking for you. You can either embed your Calendly link on your website or email it to others.

The person booking picks an open time, and the event appears on your calendar automatically. As of October 2026, Calendly says more than 50 million people use it; the original version of this article also named teams at LinkedIn and Zendesk among its users, a claim taken from earlier company marketing.

Final Thoughts

All the apps above are strong shareable calendar options for anyone who has a daily routine to keep, a schedule to coordinate or a busy life to manage. Each one helps you stay organized by offering more than a plain calendar.

Calendar Apps Compared

How Do You Choose the Right Calendar App?

The right calendar app depends mostly on the devices and email account you already use. Choosing an app that syncs natively with your account avoids duplicate events and missed reminders.

• Match your ecosystem: Google Calendar suits Gmail and Android users; iCloud Calendar suits iPhone and Mac users.
• Check sync options: Business Calendar 2 syncs with Google Calendar, Outlook Calendar, Exchange and CalDAV, so it can sit on top of an existing account.
• Decide whether you need booking links: Calendly lets other people pick a free slot from your availability, which a standard calendar does not do on its own.
• Consider desktop use: Thunderbird keeps email and calendar in one free desktop program on Windows, macOS and Linux.
• Watch plan limits: Calendly’s free plan includes one event type and one calendar connection; paid plans connect up to six calendars.

What Do the Free Versions Include?

Google Calendar, iCloud Calendar and the Thunderbird calendar are free to use. Business Calendar 2 Planner is free to download but contains ads and offers in-app purchases. Calendly’s free plan includes one event type, one calendar connection, one-on-one scheduling and a customizable booking page, while features such as round-robin scheduling require a paid plan.

For more ways to manage your time, see these time management tools for small business owners and these tips for keeping on top of your schedule. If you prefer paper, this guide explains how to organize home duties with a printable calendar.

Written byMaria HillsMore from Maria Hills →

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