The Best aCalendar Alternatives for Seamless Scheduling
aCalendar has long been a go-to Android calendar app, lauded for its intuitive navigation, week numbers display, and extensive language support. It seamlessly syncs with Google Calendar, offering features like per-event colors, flexible recurrences, and even moon phases. However, as excellent as aCalendar is, users often seek alternatives for various reasons – perhaps looking for different platform compatibility, specific feature sets, or a fresh user interface. If you're on the hunt for a new scheduling companion, this guide to aCalendar alternatives is for you.
Top aCalendar Alternatives
Whether you need cross-platform availability, advanced integration, or a minimalist design, there's a perfect calendar app waiting for you. Let's explore some of the top contenders that can rival aCalendar's functionality.

Google Calendar
Google Calendar is a ubiquitous and highly versatile multi-platform calendar tool that allows you to fill in events with images and map coordinates. Available for Free on Web, Android, iPhone, Chrome OS, and more, it offers features like Material design, data export/import, IFTTT integration, reminders for deadlines, and crucial shared calendars for seamless collaboration. It's a strong aCalendar alternative for anyone deeply integrated into the Google ecosystem and needing robust syncing capabilities across devices.

Microsoft Office Outlook
Part of the comprehensive Microsoft Office Suite, Outlook is a personal information manager that excels at managing your email, calendar, contacts, and tasks. Available as Freemium software on Mac, Windows, Web, Android, iPhone, and many other platforms, it boasts extensive features like address book integration, built-in calendar, Exchange integration, Dropbox/OneDrive integration, and shared calendars. For users seeking a powerful, all-in-one productivity hub beyond just calendar management, Outlook is an excellent aCalendar alternative, especially within a corporate or Microsoft-centric environment.

Etar
Etar is a simple, Material Design, and Open Source calendar app for Android and Android Tablet users. It focuses on providing essential calendar functionalities like month, week, day, and agenda views without any frills. As a Free and Open Source aCalendar alternative, Etar is perfect for those who prioritize a lightweight, ad-free experience with a clean interface and appreciate community-driven improvements.

Apple Calendar
For users deeply entrenched in the Apple ecosystem, Apple Calendar is the native and most integrated solution. Available for Free on Mac, iPhone, iPad, and iCloud, it allows users to keep track of their busy schedules and share them easily with others. Its key feature is seamless synchronization with iCloud and a straightforward Week Planner view. If you're an iOS or macOS user seeking a tightly integrated aCalendar alternative, Apple Calendar is an obvious choice.

Simple Calendar
Simple Calendar is a Commercial and Open Source calendar app available for Android and Android Tablet. It offers a straightforward approach to scheduling with optional CalDAV synchronization, easy creation of recurring events, and customizable reminders. It also features week numbers display, similar to aCalendar. For users who appreciate a clean interface, customizable options, and the possibility of open-source transparency, Simple Calendar is a solid aCalendar alternative.

MineTime
MineTime is a Free, modern, and multi-platform calendar application available for Mac, Windows, and Linux. It connects to various calendar providers, including Google Calendar and Microsoft Exchange, and stands out with its Artificial Intelligence-powered features for personal assistance and scheduling. If you're seeking a cross-platform aCalendar alternative with intelligent scheduling capabilities and robust calendar integration, MineTime is an innovative option.

Calendar Lock PEA
Calendar Lock PEA (Password Encrypted Calendar) is a Free and Open Source solution available for Mac, Windows, and Linux, focusing heavily on privacy and security. It displays iCalendars that are only plaintext in RAM but are always encrypted on the device, using authenticated encryption for enhanced privacy. For users whose primary concern is the privacy and security of their calendar data, Calendar Lock PEA offers a unique and highly secure aCalendar alternative.

BusyCal
BusyCal is a powerful and flexible Commercial calendar app designed specifically for macOS users. It's packed with time-saving features and compatible with all leading cloud services. BusyCal stands out with features like group calendar filters and integrated todos, making it a robust aCalendar alternative for Mac users seeking advanced functionality and a comprehensive scheduling tool.

Business Calendar
Business Calendar for Android is a Freemium complete calendar application that synchronizes with your Google calendars. It offers a smooth scroll and zoomable multi-day view, along with integrated todos, catering specifically to productivity-focused users. As a comprehensive aCalendar alternative for Android and Android Tablet users, Business Calendar provides a feature-rich experience for managing professional and personal schedules.

CalenGoo
CalenGoo is a Commercial calendar app that provides a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) across multiple platforms including Mac, Windows, Linux, Android, and iPhone. It supports CardDAV and offers strong synchronization with Google Calendar. For users heavily reliant on Google Calendar but looking for a more feature-rich interface and cross-platform compatibility beyond what aCalendar offers, CalenGoo is a strong contender.
With a diverse range of aCalendar alternatives available, from deeply integrated ecosystem solutions to privacy-focused tools and AI-powered schedulers, you're sure to find an app that perfectly matches your unique needs. Consider your platform preferences, essential features, and how you interact with your calendar to make the best choice for seamless and efficient scheduling.