Comparison

Calendars vs DuoTask

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calendars

This app combines calendar, task management, and habit tracking to boost productivity and organization. It offers seamless syncing across Apple devices and integrates with popular services like Google Calendar. Plan your day, manage tasks, and build routines with customizable views and features.

Highlights
  • Calendar and task management
  • Habit tracking and routine building
  • Cross-device syncing
  • Natural language event creation
  • Integration with Google Calendar and Zoom
  • Customizable views and widgets
Features
Read full description

Calendars by Readdle is the all-in-one calendar, task manager, daily planner, and habit tracker — seamlessly working across all your Apple devices: Mac, iPhone, iPad, and Apple Watch. Plan your day, build better habits, boost productivity, and stay organized with powerful features and smooth sync between all your devices. What you can do with Calendars: • View and manage your calendar with daily, weekly, and monthly views • Create events, set reminders, and never miss important dates • Use the built-in agenda planner to focus on what matters most • Organize your to-do list and manage your tasks with ease • Quickly add events or to-do items using natural language • Build routines and track your habits to stay consistent • Take a guided productivity course to improve time management and focus • Sync across devices with Google Calendar, iCloud, and more • Customize your planner calendar with color coding and widgets • Join Zoom, Google Meet, or GoToMeeting directly from your calendar • Stay in control of your time, wherever you are Whether you're planning a busy workday, building new habits, or working on personal growth, Calendars brings everything together to help you own your time — across all your Apple devices. Privacy Policy: https://readdle.com/calendars/legal/privacy Terms of Service: https://readdle.com/calendars/legal/terms Have questions, comments, or issues? Don’t hesitate to reach out to us at http://readdle.com/contact

About

DuoTask

Features
Read full description

DuoTask helps you organize everyday tasks with simple shared lists, reminders, and quick notes. Create lists for groceries, home routines, errands, plans, or anything you need to remember. Add items, check them off, and keep everything easy to follow. Share lists with another person or a group using a simple invite link. DuoTask is useful for couples, families, roommates, friends, and small teams who want to stay aligned without long messages or confusion. Set task alarms and choose whether a notification should be shared with the people on the list. Shared notifications help everyone remember important tasks at the right time. Each list also includes Chat Notes, a lightweight space for quick updates related to that list. Leave a note, confirm something was done, or add context without leaving the task list. Main features: - Create multiple task lists - Share lists with invite links - Add, complete, and delete tasks - Set task alarms and reminders - Share notifications with list members - Use Chat Notes for quick list updates - Manage list participants - Choose and edit your nickname - Sync your data across devices DuoTask is designed to be simple, fast, and practical for everyday shared organization.

Screenshots

Calendars4 screens
DuoTask4 screens

Verdict

The call

The clearest difference is in-app purchases: DuoTask at none against Calendars's 10. Calendars's advantage is ads (none vs shown) and chart position (#121 vs unranked). On price and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calendars sells 10 in-app purchases, starting at $3.99 per month. DuoTask asks for nothing beyond the download.

Scorecard4 real differences · 7 level
Calendars versus DuoTask: the parameters behind the verdict, then further details
ParameterCalendarsDuoTask
PriceFreeFree
Rating4.7 (123K ratings) — better—
Positive reviews55.8% of reviews—
Number of ratings123K — better—
Update frequencyWeekly—
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemium—
Best chart rank#121 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone
Requires iOS18.217.6 — better
Further details — not scored
Size413 MB18 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedCaio cesar Nascimento da silva

Bugs and requests

Calendars

Reported bugs

3 issues
  • Disappearing events and appointments
  • Upgrade process causing data loss
  • Freezing and crashing on certain devices

Requested features

5 requests
  • Recurring events for free users
  • Customizable widgets and app icons
  • Ability to archive/restore past events
  • Improved Apple Watch integration
  • Shared calendars and family management

DuoTask

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Calendars

Subscriptions6
  • Calendars PRO 1 Month$3.991 Month
  • Calendars by Readdle: Interesting Calendars1 Month trial$3.991 Year
  • Calendars PRO 1 Month7 Days trial$3.991 Month
Show 3 more
  • Calendars PRO 1 Year7 Days trial$19.991 Year
  • Calendars PRO 1 Year1 Year trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial$21.991 Year
One-time4
  • Smart Input Upgrade$1.99
  • My schedule planner, Organizer$6.99
  • Full Pack$12.99
Show 1 more
  • Recurring Events$31.99
None

DuoTask

No in-app purchases

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is DuoTask free?
DuoTask is free to download, with no in-app purchases.
Do Calendars or DuoTask have ads?
DuoTask shows ads; Calendars does not.

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