Comparison

Calendars vs To

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

To

This app helps you organize your life with a structured daily planner, task manager, and reminder system. Break down projects and tasks, schedule your day, and integrate with your calendar to stay productive and meet deadlines.

Highlights
  • Project and subproject management
  • Task and subtask breakdown
  • Prioritized to-do lists
  • Daily routine planning
  • Schedule and appointment management
  • Calendar integration
Features
Read full description

Welcome to TaskUp, an ultimate life organizer, structured daily planner, and reliable to do list with reminder, designed to help you stay organized and productive. Whether you need a daily routine planner, a powerful reminder system, or a comprehensive to do list task manager, TaskUp has it all. Put the time blocking on your service, stay on top of your tasks, manage your projects, and never miss a deadline! Project and Subproject manager Manage your projects and subprojects seamlessly. Break down complex projects into subprojects. Set a start and end dates for each of them. Organize your work into different sections and track your progress with ease. Task and Subtask list Break down your tasks into manageable subtasks to keep track of every detail. Whether it’s a simple routine or a complex project, TaskUp helps you stay organized. To-Do List Create, manage, and prioritize your to-do lists effortlessly. Add tasks and notes to your to-do list so you can stay focused and on top of your daily tasks. Daily Routine Planner Plan your day effectively with our structured daily planner. Schedule your tasks, set reminders, and ensure a productive day every day. Integrate your daily plans into your to-do list. Organizer and Schedule Planner Plan your day and week, schedule tasks, appointments, and reminders to stay on top of everything. This life organizer helps you arrange and manage your work and personal life efficiently. Calendar Integrate your tasks with the calendar to get a clear view of your schedule. Our fantastical digital calendar helps you track your deadlines, appointments, and important events. Privacy Policy: https://www.todo-list-studio.com/uptodo/privacy_policy_ios Terms of Use: https://www.todo-list-studio.com/uptodo/terms_and_conditions_ios

Screenshots

Calendars4 screens
To4 screens

Verdict

The call

The clearest difference is review sentiment: To at 94% against Calendars's 56%. To also leads on rating (5.0 vs 4.7) and iOS requirement (15.0 vs 18.2). Calendars's advantage is ads (none vs shown) and ratings volume (123K vs 29). On price, in-app purchases, monetization model and device support 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 and To sells 10 in-app purchases, starting at $4.90 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

To holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Calendars has 123K ratings behind it against 29, so its average is the more settled of the two. Written reviews point the same way: 56% of Calendars's written reviews are positive against 94% of To's.

UpkeepUpdate frequency

Calendars ships an update weekly, To fortnightly. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard7 real differences · 4 level
Calendars versus To: the parameters behind the verdict, then further details
ParameterCalendarsTo
PriceFreeFree
Rating4.7 (123K ratings)5.0 (29 ratings) — better
Positive reviews55.8% of reviews94.4% of reviews — better
Number of ratings123K — better29
Update frequencyWeekly — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#111 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS18.215.0 — better
Further details — not scored
Size413 MB75 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedSergey Lomakin

Customer experience

Calendars

All ratings122,497 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews1,290 reviews
Positive55.8%
Neutral8.6%
Negative35.6%

To

All ratings28 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive94.4%
Neutral5.6%
Negative0.0%

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

To

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
10 purchases

To

Subscriptions7
  • Monthly TaskUp Premium$4.901 Month
  • Weekly Premium3 Days trial$4.907 Days
  • Annual Premium 70% OFF$11.901 Year
Show 4 more
  • 60% OFF Special Offer3 Days trial$15.901 Year
  • 50% OFF Special Offer3 Days trial$19.901 Year
  • Annual Premium$39.901 Year
  • Annual TaskUp premium3 Days trial$49.991 Year
One-time3
  • Lifetime Premium$49.90
  • 50% OFF Lifetime Premium$49.99
  • Lifetime Premium$79.90

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is To free?
To is free to download, with in-app purchases available.
Which has better reviews, Calendars or To?
To is rated higher. Calendars averages 4.7 out of 5 from 123K ratings, while To averages 5.0 from 29 ratings.
Do Calendars or To have ads?
To shows ads; Calendars does not.
Which is updated more often, Calendars or To?
Calendars ships an update weekly, and To fortnightly. Most recently, Calendars was updated on November 6, 2026 and To on November 4, 2026.

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