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aCalendar vs HackMD

Professional comparison and analysis to help you choose the right software solution for your needs.

aCalendar icon
aCalendar
HackMD icon
HackMD

aCalendar vs HackMD: The Verdict

⚡ Summary:

aCalendar: aCalendar is an open-source calendar and scheduling application for Android. It features a simple interface for managing events, reminders, and tasks. Syncs with various services like Google Calendar.

HackMD: HackMD is a real-time collaborative markdown editor and note-taking web application. It allows teams to write, edit, review and publish markdown documents together in real-time. Features include GitHub/GitLab integration, code blocks, task lists, and drawing.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature aCalendar HackMD
Sugggest Score — —
Category Office & Productivity Remote Work & Education
Pricing Open Source Open Source

Product Overview

aCalendar
aCalendar

Description: aCalendar is an open-source calendar and scheduling application for Android. It features a simple interface for managing events, reminders, and tasks. Syncs with various services like Google Calendar.

Type: software

Pricing: Open Source

HackMD
HackMD

Description: HackMD is a real-time collaborative markdown editor and note-taking web application. It allows teams to write, edit, review and publish markdown documents together in real-time. Features include GitHub/GitLab integration, code blocks, task lists, and drawing.

Type: software

Pricing: Open Source

Key Features Comparison

aCalendar
aCalendar Features
  • Month, week, day, agenda views
  • Recurring events
  • Reminders and alarms
  • Synchronization with Google Calendar
  • Integration with contacts
  • Multiple calendar support
  • Event sharing via SMS, email
  • Search events
  • Customizable widgets
  • Multiple color themes
HackMD
HackMD Features
  • Real-time collaborative editing
  • Markdown support
  • Code block support
  • GitHub/GitLab integration
  • Task lists
  • Drawing support

Pros & Cons Analysis

aCalendar
aCalendar
Pros
  • Open source
  • Simple and easy to use
  • Good integration with Android
  • Syncs with Google Calendar
  • Basic features for free
Cons
  • Limited features compared to proprietary options
  • No support for iOS or web
  • Sync issues reported
  • Development seems stagnant
HackMD
HackMD
Pros
  • Free for individuals
  • Great for collaboration
  • Integrates with GitHub/GitLab
  • Supports markdown formatting
  • Has useful features like code blocks and drawings
Cons
  • Formatting can get messed up with multiple simultaneous editors
  • No WYSIWYG editor
  • Limited free plan storage

Pricing Comparison

aCalendar
aCalendar
  • Open Source
HackMD
HackMD
  • Open Source

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Learn More About Each Product

aCalendar
aCalendar
Reviews, pricing & alternatives →
HackMD
HackMD
Reviews, pricing & alternatives →

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