Calendar Z vs Simple Calendar Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Integrated reminder system
- Apple Watch compatibility
- Advanced repeating event setup
- Event display on Map
- Widget support
- Template function for quick event addition
- Customizable appearance
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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.
Simple Calendar Tracker
Organize your schedule by tracking event occurrences across different calendars. Combine multiple calendars to identify recurring patterns and gain insights into your activities.
- Track event occurrences
- Manage separate calendars
- Combine calendars
- Identify patterns
- Schedule organization
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- Keep track of whether events occur or not in separate calendars. - Combine calendars together and find patterns.
Screenshots
Verdict
The clearest difference is rating: Calendar Z at 4.3 against Simple Calendar Tracker's 2.9. Calendar Z also leads on ratings volume (723 vs 11) and update cadence (every 5 weeks vs every 3 months). Simple Calendar Tracker's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price 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
Both are free to download. Calendar Z sells 1 one-off in-app purchase. Simple Calendar Tracker asks for nothing beyond the download.
Calendar Z holds the better App Store score, 4.3 against 2.9. That said, the two scores are not equally well evidenced: Calendar Z has 723 ratings behind it against 11, 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 54% of Simple Calendar Tracker's.
Calendar Z ships an update every 5 weeks, Simple Calendar Tracker every 3 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.
| Parameter | Calendar Z | Simple Calendar Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (723 ratings) — better | 2.9 (11 ratings) |
| Positive reviews | 65.0% of reviews — better | 53.8% of reviews |
| Number of ratings | 723 — better | 11 |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 16.6 | 14.5 — better |
| Further details — not scored | ||
| Size | 12 MB | 18 MB |
| Age rating | 17+ | 4+ |
| Developer | PiyoLog Inc. | Kitten Cat LLC |
Customer experience
Calendar Z
Simple Calendar Tracker
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
Simple Calendar Tracker
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calendar Z
- Disappear Ads$1.99
Simple Calendar Tracker
No in-app purchases
Questions
Is Calendar Z free?
Is Simple Calendar Tracker free?
Which has better reviews, Calendar Z or Simple Calendar Tracker?
Do Calendar Z or Simple Calendar Tracker have ads?
Which is updated more often, Calendar Z or Simple Calendar Tracker?
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