Comparison

Calendar 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

Calendar

Organize your entire schedule in one place. View events from multiple accounts, manage tasks, and plan gatherings with others. Stay on top of appointments, holidays, and birthdays with customizable views and shared calendars.

Highlights
  • Unified schedule view
  • Event creation and editing
  • Task management integration
  • Calendar sharing
  • Multiple calendar support
  • Customizable views
Features
Read full description

Calendar Plan your time, and coordinate with others using the Calendar app. See a holistic view of your schedule with events from all your different calendar accounts, alongside reminders, holidays, birthdays and subscription calendars. Invite others to events, respond to invitations, or share entire calendars to make plans with colleagues, family, and friends. Your Complete Schedule Keep track of all your events from different calendar accounts together in the Calendar app. Connect accounts from iCloud, Exchange, Google and others. Organize your events using multiple calendars with different colors. And view all your events alongside each other in List, Day, Week or Month views. Event Planning Create and edit events, appointments, and meetings. Add an alert to be reminded of an event, a location to receive a notification when it’s time to leave, a link to a video call to quickly connect, related attachments, notes and more. Easily send and receive events through invitations using iCloud, Exchange and other calendar accounts. Reminders in Calendar Manage your tasks easily with reminders. Create, view, edit and complete reminders from the Reminders app right alongside all your other meetings and appointments in the Calendar app. Shared Calendars Share an iCloud calendar with family, colleagues or friends. They can easily see events, add more events, receive alerts, or make changes to the calendar. Even More Calendars Add other calendars to keep track of even more events. Holiday Calendars show up-to-date information about global holidays. See contacts’ birthdays with the Birthdays calendar. Events recognized by Siri in apps like Mail appear in the Siri Suggestions calendar. And you can even subscribe to calendars for your favorites sports teams, TV shows and more from the web.

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

Calendar3 screens
Simple Calendar4 screens

Verdict

The call

The clearest difference is in-app purchases: Calendar at none against Simple Calendar's 3. Calendar also leads on ads (none vs shown) and rating (4.9 vs 4.4). Simple Calendar's advantage is update cadence (every 3 weeks vs every 4 months) and review sentiment (60% vs 36%). On price 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. Simple Calendar sells 3 in-app purchases, starting at $1.99 per month. Calendar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calendar holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Calendar has 1.5M ratings behind it against 74, so its average is the more settled of the two. Written reviews complicate that: 36% of Calendar'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

Calendar ships an update every 4 months, Simple Calendar every 3 weeks. The most recent releases landed on November 8, 2026 and November 3, 2026 respectively.

Scorecard9 real differences · 1 level
Calendar versus Simple Calendar: the parameters behind the verdict, then further details
ParameterCalendarSimple Calendar
PriceFreeFree
Rating4.9 (1.5M ratings) — better4.4 (74 ratings)
Positive reviews36.1% of reviews60.0% of reviews — better
Number of ratings1.5M — better74
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS10.0 — better18.0
Further details — not scored
Size8 MB9 MB
Age rating4+4+
DeveloperAppleHeart Relay Inc.

Customer experience

Calendar

All ratings1,514,771 ratings
Positive97.2%
Neutral1.7%
Negative1.0%
Written reviews3,390 reviews
Positive36.1%
Neutral13.4%
Negative50.5%

Simple Calendar

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

Bugs and requests

Calendar

Reported bugs

5 issues
  • Time zones not handled properly, causing appointment time issues
  • Recurring events not deleted properly
  • Inability to delete events, leading to a cluttered calendar
  • Syncing issues between devices
  • Search function not working as expected

Requested features

9 requests
  • Attachment option to add files, photos, PDFs, etc. to events
  • Integration with Reminders app to schedule and view tasks
  • Week view in portrait mode
  • Option to select which reminder lists show in the calendar
  • Openings and proposals feature
Show 4 more
  • Ability to change colors of individual events
  • Cash flow diary to track expenses/income
  • Monthly calendar view
  • Ability to highlight the entire week with a color

Simple Calendar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Calendar

No in-app purchases

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 Calendar free?
Calendar is free to download, with no in-app purchases.
Is Simple Calendar free?
Simple Calendar is free to download, with in-app purchases available.
Which has better reviews, Calendar or Simple Calendar?
Calendar is rated higher. Calendar averages 4.9 out of 5 from 1.5M ratings, while Simple Calendar averages 4.4 from 74 ratings.
Do Calendar or Simple Calendar have ads?
Simple Calendar shows ads; Calendar does not.
Which is updated more often, Calendar or Simple Calendar?
Calendar ships an update every 4 months, and Simple Calendar every 3 weeks. Most recently, Calendar was updated on November 8, 2026 and Simple Calendar on November 3, 2026.

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