Best Calendar Products in 2025

Spend less time managing your day & more time enjoying it.

Key Google Calendar features:

Cross-Platform Accessibility Integration with Other Google Services Collaborative Features Event Notifications

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. .

Key MailReach.co features:

Deliverability Improving Email Warming Meaningful Warming Content Smart Warming Algorithm

Visit website paid $19.5 / Monthly (Pro)

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Key Microsoft Outlook features:

Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

Key Simple Calendar features:

Open Source Privacy-Focused Ad-Free Experience Offline Functionality

Open Source

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Key Thunderbird features:

Free and Open Source Customization Cross-Platform Robust Security

Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.

Key Fantastical 2 features:

User Interface Natural Language Parsing Integrations Reminders

All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.

Key Morgen.so features:

User-Friendly Interface Cross-Platform Support Integration with Popular Tools Time Blocking Feature

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat. .

Key eM Client features:

Email Calendar Task management Events

freemium

Mailbird is the best email client for Windows 7, 8 and 10.

Key Mailbird features:

User-Friendly Interface Integration with Third-Party Apps Speed and Performance Unified Inbox

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

Key Spark Mail features:

Smart Inbox Collaborative Email Customization Unified Inbox

Open Source

Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Key Calendly features:

User-Friendly Interface Integration Capabilities Customizable Availability Automated Reminders

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.

Key Calendar Lock PEA features:

Cloud storage

Open Source free

Airmail is a lightweight and lightning fast mail client for Mac.

Key Airmail features:

Customizable Interface Integration with Other Apps Unified Inbox Advanced Filtering and Search

Rainlendar - Customizable desktop calendar.

Key Rainlendar features:

Customizable Cross-Platform Lightweight Multiple Calendar Support