Comparison

Calendars vs Simple Calendar

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

Simple Calendar

Quickly view your monthly schedule and upcoming events with this easy-to-use calendar app. It offers widget support for at-a-glance access to your day and plans, with all data stored securely on your device. Enjoy a comfortable viewing experience with dark mode support.

Highlights
  • Monthly schedule overview
  • Quick event registration
  • Widget support for daily plans
  • Secure on-device data storage
  • Dark mode compatibility
Features
Read full description

【Features】 ● You can check your schedule for the month at a glance.   You can quickly register your events and check them quickly.   There are no complicated settings before using the calendar. ● Widget support   You can quickly check the date, day of the week, and future plans for the day with the widget. We have added a monthly calendar to the widget. If you change the day of the week in the app, it will be reflected in the widget. ● The security is safe and secure.   The information you add to the calendar is stored only on your device. You can use the calendar with peace of mind because the information is not sent to an external server. ●You can also use it in dark mode, which is easy on the eyes. This app also supports dark mode, so you can use it in dark mode, which is easy on the eyes. [Premium Plan (optional)] An auto-renewable subscription that unlocks all color themes, photo backgrounds, and custom colors. - Monthly: $1.99/month - Yearly: $11.99/year (7-day free trial included) Payment will be charged to your Apple ID account. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings. * If you previously purchased "Remove Ads", ads stay hidden without a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://calendar.heart-relay.com/privacy-policy/

Screenshots

Calendars4 screens
Simple Calendar4 screens

Verdict

The call

The clearest difference is ads: Calendars at none against Simple Calendar's shown. Calendars also leads on ratings volume (123K vs 74) and rating (4.7 vs 4.4). On price, review sentiment, 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 10 in-app purchases, starting at $3.99 per month and Simple Calendar sells 3 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 4.4. That said, the two scores are not equally well evidenced: Calendars has 123K ratings behind it against 74, so its average is the more settled of the two. Written reviews complicate that: 56% of Calendars's written reviews are positive against 60% of Simple Calendar's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calendars ships an update weekly, Simple Calendar every 3 weeks. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 5 level
Calendars versus Simple Calendar: the parameters behind the verdict, then further details
ParameterCalendarsSimple Calendar
PriceFreeFree
Rating4.7 (123K ratings) — better4.4 (74 ratings)
Positive reviews55.8% of reviews60.0% of reviews — better
Number of ratings123K — better74
Update frequencyWeekly — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#111 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPod
Requires iOS18.218.0 — better
Further details — not scored
Size413 MB9 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedHeart Relay Inc.

Customer experience

Calendars

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

Simple Calendar

All ratings68 ratings
Positive88.2%
Neutral4.4%
Negative7.4%
Written reviews10 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

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

Simple Calendar

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
3 purchases

Simple Calendar

Subscriptions2
  • Premium Plan (Monthly)$1.991 Month
  • Premium Plan (Yearly)7 Days trial$11.991 Year
One-time1
  • Hide ads$11.99

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is Simple Calendar free?
Simple Calendar is free to download, with in-app purchases available.
Which has better reviews, Calendars or Simple Calendar?
Calendars is rated higher. Calendars averages 4.7 out of 5 from 123K ratings, while Simple Calendar averages 4.4 from 74 ratings.
Do Calendars or Simple Calendar have ads?
Simple Calendar shows ads; Calendars does not.
Which is updated more often, Calendars or Simple Calendar?
Calendars ships an update weekly, and Simple Calendar every 3 weeks. Most recently, Calendars was updated on November 4, 2026 and Simple Calendar on November 3, 2026.

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