Comparison

Calendars vs ToDo Notification Reminders

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 a calendar, task manager, daily planner, and habit tracker. It helps users plan their day, build habits, boost productivity, and stay organized with seamless syncing across all Apple devices. Features include event creation, to-do list management, natural language input, and integration with popular meeting platforms.

Highlights
  • Calendar, task, and habit management
  • Daily, weekly, and monthly views
  • Natural language event creation
  • To-do list organization
  • Cross-device syncing
  • Meeting platform integration
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

ToDo Notification Reminders

This app helps you stay organized by setting reminders for tasks, deadlines, and recurring events. Avoid missed appointments and late fees with timely, quiet notifications. Manage your schedule effectively and free up your mind.

Highlights
  • Set recurring reminders
  • Create deadline alerts
  • Schedule event notifications
  • Get quiet notifications
  • Organize tasks with colorful markers
  • Plan events in advance
Features
Read full description

Your busy life deserves this! Todo Notification Reminders is an award-winning app used by thousands of people to stay organized and get more done. It’s never been easier to organize your life Ensure recurring tasks always get done by adding reminders to them. Add recurring reminders for your weekly meetings, periodical doctor appointments and license renewals, and free-up your mind for what’s important Avoid disturbing alarms, we'll send a quiet notification you won't be able to miss! ◆◆◆◆◆◆◆◆◆◆ • Deadlines are no longer a problem with Reminder; simply create a reminder for each deadline and let the app do the work for you. • Meetings – work schedules can get busy and the last thing you want to do, when such a thing happens, is miss one of your meetings. Create a weekly reminder for each meeting and be sure you will never miss one. • Homework and Assignments – we are all familiar with them, and know that to get all of them done on time a good planning is required. Using Reminder you can solve this problem and make your life easier. • Birthdays – sometimes it can be difficult to remember all the birthdays of your close friends and relatives, and you most definitely don’t want to make any of them upset. But don’t worry, Reminder can help you with this, too; just create a yearly reminder for each birthday and let the app do the rest. • Anniversaries – never forget about the important anniversaries. Create a recurring reminder for each special date. • Errands – create a personalized list of tasks to take care of your errands with ease. Add some extra meaning to the tasks using the colorful markers. • Paying Bills – no more extra charges for the late fees! Use it to remind you about the next payment day. • Important Calls – stay in touch with the people you care about. •Taking Medication – never forget to take the right medication at a right time; create a daily reminder to help you do just that. • Use it as an event planner. Plan your events in advance with Reminder. Create the informative reminders easily, and be assured you will never miss a thing. ◆◆◆◆◆◆◆◆◆◆ Important Links: Licensing Agreement: http://www.apple.com/legal/itunes/appstore/dev/stdeula

Screenshots

Calendars4 screens
ToDo Notification Reminders4 screens

Verdict

The call

The clearest difference is rating: Calendars at 4.7 against ToDo Notification Reminders's 3.4. Calendars also leads on ads (none vs shown) and review sentiment (56% vs 21%). ToDo Notification Reminders's advantage is iOS requirement (16.0 vs 18.2). On price, in-app purchases and monetization model 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 18 in-app purchases, starting at $3.99 per month and ToDo Notification Reminders sells 10 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calendars holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: Calendars has 122K ratings behind it against 498, 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 21% of ToDo Notification Reminders's.

UpkeepUpdate frequency

Calendars ships an update weekly, ToDo Notification Reminders fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 3 level
Calendars versus ToDo Notification Reminders: the parameters behind the verdict, then further details
ParameterCalendarsToDo Notification Reminders
PriceFreeFree
Rating4.7 (122K ratings) — better3.4 (498 ratings)
Positive reviews55.8% of reviews — better21.4% of reviews
Number of ratings122K — better498
Update frequencyWeekly — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#120 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS18.216.0 — better
Further details — not scored
Size412 MB77 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedNota Systems, LLC

Customer experience

Calendars

All ratings122,379 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews1,286 reviews
Positive55.8%
Neutral8.6%
Negative35.6%

ToDo Notification Reminders

All ratings495 ratings
Positive59.0%
Neutral3.4%
Negative37.6%
Written reviews103 reviews
Positive21.4%
Neutral7.8%
Negative70.9%

User reviews

Calendars

From 122K App Store ratings

What we love

  • 🌟 Excellent calendar app
  • 👍 Easy to use and organize
  • 🎨 Helpful color-coding
  • 📆 Seamless integration with other calendars
  • 🗓️ Detailed monthly/weekly views

Room to improve

  • 🐛 Occasional glitches and data loss
  • 💰 Concerns over subscription model
  • 🕰️ Cumbersome date/time selection process
  • 🔍 Limited location search functionality
  • 🔄 Sync issues between devices

ToDo Notification Reminders

From 498 App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Clean and minimalist design
  • 🚀 Fast and responsive
  • 💡 Useful for simple reminders

Room to improve

  • 🐛 Glitchy and unreliable
  • 💰 Overly expensive for basic features
  • 🔍 Limited customization options
  • 🔁 Difficulty managing/deleting reminders
  • 🔒 Subscription-based model with ads

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

ToDo Notification Reminders

Reported bugs

4 issues
  • Reminders not triggering at the correct time
  • Date/time settings resetting unexpectedly
  • Inability to edit or delete existing reminders
  • Sync issues between devices

Requested features

4 requests
  • Ability to set recurring reminders on specific days
  • Option to customize notification sounds and settings
  • Improved sync and cross-device support
  • Better reminder management tools

In-app purchases

18 purchases

Calendars

Subscriptions9
  • 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 6 more
  • Calendars PRO 1 Year3 Months trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial2 variants$19.991 Year
  • Calendars PRO 1 Year1 Year trial$19.991 Year
  • Calendars PRO 1 Year14 Days trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial$21.991 Year
  • Calendars PRO 1 Year7 Days trial$29.991 Year
One-time9
  • Calendars PRO LifetimeFree
  • Invites & Attendees Upgrade$1.99
  • Smart Input Upgrade$1.99
Show 6 more
  • Full Upgrade$4.99
  • Interesting Calendars$5.99
  • My schedule planner, Organizer$6.99
  • Full Pack$12.99
  • Reminders & Calendars$19.99
  • Recurring Events$31.99
10 purchases

ToDo Notification Reminders

Subscriptions4
  • 7-Day Free Trial7 Days trial$1.991 Month
  • 1 Month$1.991 Month
  • 7-day Free Trial7 Days trial$14.991 Year
Show 1 more
  • 12 Months$14.991 Year
One-time6
  • Remove ads$1.99
  • Unlock app discount$2.99
  • Unlock app discount ad free$3.99
Show 3 more
  • Unlock app$14.99
  • Lifetime Promotion$34.99
  • Lifetime$34.99

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is ToDo Notification Reminders free?
ToDo Notification Reminders is free to download, with in-app purchases available.
Which has better reviews, Calendars or ToDo Notification Reminders?
Calendars is rated higher. Calendars averages 4.7 out of 5 from 122K ratings, while ToDo Notification Reminders averages 3.4 from 498 ratings.
Do Calendars or ToDo Notification Reminders have ads?
ToDo Notification Reminders shows ads; Calendars does not.
Which is updated more often, Calendars or ToDo Notification Reminders?
Calendars ships an update weekly, and ToDo Notification Reminders fortnightly. Most recently, Calendars was updated on October 26, 2026 and ToDo Notification Reminders on October 24, 2026.

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