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aCalendar vs OpenProject

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

aCalendar icon
aCalendar
OpenProject icon
OpenProject

aCalendar vs OpenProject: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature aCalendar OpenProject
Sugggest Score — —
Category Office & Productivity Business & Commerce
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

OpenProject
OpenProject

Description: OpenProject is an open source project management software. It provides tools to plan projects and tasks, track time and costs, collaborate with teams, and report on progress. Key features include Gantt charts, roadmaps, issue tracking, forums, wikis, and document management.

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
OpenProject
OpenProject Features
  • Gantt charts
  • Roadmaps
  • Issue tracking
  • Forums
  • Wikis
  • Document management

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
OpenProject
OpenProject
Pros
  • Open source and free
  • Customizable and extensible
  • Good collaboration features
  • Intuitive user interface
Cons
  • Can be complex for simple needs
  • Limited reporting compared to paid options
  • Steep learning curve

Pricing Comparison

aCalendar
aCalendar
  • Open Source
OpenProject
OpenProject
  • Open Source

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Learn More About Each Product

aCalendar
aCalendar
Reviews, pricing & alternatives →
OpenProject
OpenProject
Reviews, pricing & alternatives →

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