Comparison

Calendar Z vs Calendar.online

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

Head to head
About

Calendar Z

A straightforward yet powerful calendar application designed for efficient schedule management. It features an integrated reminder system, supports Apple Watch, and offers advanced options for recurring events and event display.

Highlights
  • Integrated reminder system
  • Apple Watch compatibility
  • Advanced repeating event setup
  • Event display on Map
  • Widget support
  • Template function for quick event addition
  • Customizable appearance
Features
Read full description

Calendar Z is a simple yet high-level calendar app. With an integrated reminder system, it makes schedule management just that much easier. ・Works with the AppleWatch. ・Integrated reminder system. Both reminders and events are displayed on the calendar. ・Works with the iPad's Multitasking feature. Start this app while using other apps by sliding from the sides. ・Set up complicating repeating events, such as "the end of every month", "the last Saturday of each month", etc. ・Display events on the Map, and quickly access links. ・Works with widgets; you can quickly check your schedule. ・Can be displayed in landscape mode. When using side view, event start time is also displayed on the calendar. ・The calendar automatically adjusts; even if you have many events planned they will not be hidden. ・Includes a template function. Register events and reminders to a template to make addition even faster. ・Customize its appearance as you see fit. Change the calendar theme color to your favorite color. ・Change when the week begins as well as the color. ・You can use 3D touch shortcut menu for create new event or reminder.

About

Calendar.online

This free online calendar facilitates team collaboration with shareable access links. Manage permissions, set passwords, and customize views for seamless group scheduling. Access your calendar from any device with a simple bookmark.

Highlights
  • Shareable access links
  • Role-based permissions (admin, editor, reader)
  • Password protection for links
  • Customizable access link views
  • Dashboard for managing calendars
  • Device bookmarking
Features
Read full description

Our product is a free online calendar for teams and groups with easy access via access links without login. An access link is structured according to the following scheme: https://calendar.online/68dbf6166ace2865ccd7 Each access link has a specific permission. E.g. administrator, editor or reader. Use the admin link to manage your calendar. You can save this link as a bookmark on all your devices, for example. You could forward the editor or reader link to your teammates. Additional settings can be made for each access link. For example: - Permissions for specific sub-calendars - Password protection for extra security - Default access link view (for example 'day', 'week' and so on) - Custom access links. For example: https://calendar.online/sports In the dashboard view of the app you can add existing access links or register a new calendar. In this case, the admin link will be added automatically on the dashboard. You can access the dashboard from the calendar at any time using the button in the top left corner. To open the settings of a calendar, please open the calendar via the administrator link and then click on the gear symbol at the top right corner.

Screenshots

Calendar Z3 screens
Calendar.online4 screens

Verdict

The call

The clearest difference is in-app purchases: Calendar.online at none against Calendar Z's 1. Calendar.online also leads on ads (none vs shown) and review sentiment (94% vs 65%). Calendar Z's advantage is ratings volume (722 vs 40) and update cadence (every 5 weeks vs every 2 months). On price, device support 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. Calendar Z sells 1 one-off in-app purchase. Calendar.online asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calendar.online holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Calendar Z has 722 ratings behind it against 40, so its average is the more settled of the two. Written reviews point the same way: 65% of Calendar Z's written reviews are positive against 94% of Calendar.online's.

UpkeepUpdate frequency

Calendar Z ships an update every 5 weeks, Calendar.online every 2 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
Calendar Z versus Calendar.online: the parameters behind the verdict, then further details
ParameterCalendar ZCalendar.online
PriceFreeFree
Rating4.3 (722 ratings)4.7 (40 ratings) — better
Positive reviews65.1% of reviews94.1% of reviews — better
Number of ratings722 — better40
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.615.0 — better
Further details — not scored
Size12 MB67 MB
Age rating17+4+
DeveloperPiyoLog Inc.Kalender.digital

Customer experience

Calendar Z

All ratings723 ratings
Positive82.4%
Neutral8.0%
Negative9.5%
Written reviews358 reviews
Positive65.1%
Neutral15.6%
Negative19.3%

Calendar.online

All ratings40 ratings
Positive90.0%
Neutral5.0%
Negative5.0%
Written reviews17 reviews
Positive94.1%
Neutral5.9%
Negative0.0%

Bugs and requests

Calendar Z

Reported bugs

4 issues
  • Events disappearing or not saving properly
  • Incorrect date/time display and sync issues
  • Crashes or freezes after updates
  • Compatibility problems with newer iOS versions

Requested features

5 requests
  • Ability to view and restore past events
  • Improved sync and cross-device functionality
  • More customization options for layout and colors
  • Easier event management (editing, deleting, repeating)
  • Better notification system and controls

Calendar.online

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Calendar Z

One-time1
  • Disappear Ads$1.99
None

Calendar.online

No in-app purchases

Questions

Is Calendar Z free?
Calendar Z is free to download, with in-app purchases available.
Is Calendar.online free?
Calendar.online is free to download, with no in-app purchases.
Which has better reviews, Calendar Z or Calendar.online?
Calendar.online is rated higher. Calendar Z averages 4.3 out of 5 from 722 ratings, while Calendar.online averages 4.7 from 40 ratings.
Do Calendar Z or Calendar.online have ads?
Calendar Z shows ads; Calendar.online does not.
Which is updated more often, Calendar Z or Calendar.online?
Calendar Z ships an update every 5 weeks, and Calendar.online every 2 months. Most recently, Calendar Z was updated on October 29, 2026 and Calendar.online on October 25, 2026.

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