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aCalendar vs Second Clock

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

aCalendar icon
aCalendar
Second Clock icon
Second Clock

aCalendar vs Second Clock: 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.

Second Clock: Second Clock is a free, open-source time tracking software for Windows. It allows users to track time spent on tasks and projects, with features like time entry tracking, reports, and productivity analytics.

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 Second Clock
Sugggest Score — —
Category Office & Productivity Office & Productivity
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

Second Clock
Second Clock

Description: Second Clock is a free, open-source time tracking software for Windows. It allows users to track time spent on tasks and projects, with features like time entry tracking, reports, and productivity analytics.

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
Second Clock
Second Clock Features
  • Time tracking
  • Productivity analytics
  • Multiple timers
  • Idle time tracking
  • Task management
  • Reporting
  • Export data

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
Second Clock
Second Clock
Pros
  • Free and open source
  • Simple and easy to use
  • Good for basic time tracking needs
  • Lightweight app
  • Can track idle time
Cons
  • Limited features compared to paid options
  • No mobile app
  • No collaboration tools
  • No invoicing
  • Basic reporting

Pricing Comparison

aCalendar
aCalendar
  • Open Source
Second Clock
Second Clock
  • Open Source

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Learn More About Each Product

aCalendar
aCalendar
Reviews, pricing & alternatives →
Second Clock
Second Clock
Reviews, pricing & alternatives →

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