# iCalendar vs Calendar Op.2

The clearest difference is price: Calendar Op.2 at Free against iCalendar's $2.99. Calendar Op.2 also leads on update cadence (weekly vs every 3 months). iCalendar's advantage is ads (none vs shown) and chart position (#51 vs unranked). On rating, review sentiment, ratings volume and in-app purchases there is nothing between them.

Calendar Op.2 is free to download; iCalendar costs $2.99 up front. iCalendar sells 10 in-app purchases, starting at $1.99 per year and Calendar Op.2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for iCalendar against 4.7 for Calendar Op.2. Both are backed by a comparable volume of ratings — 5.6K and 13K respectively. Written reviews are what separate them: 71% of iCalendar's written reviews are positive against 69% of Calendar Op.2's.

iCalendar ships an update every 3 months, Calendar Op.2 weekly. The most recent releases landed on November 10, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | iCalendar | Calendar Op.2 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.7 (5.6K ratings)](https://appshunter.io/ios/app/icalendar/id492076105/reviews)** | [4.7 (13K ratings)](https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896/reviews) |
| Number of ratings | 5.6K | **13K** |
| Positive reviews | **71.3% of reviews** | 68.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#51** | — |
| Size | 20 MB | 8 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Symfonies, Inc.](https://appshunter.io/developer/866948270) | [Yoshihiro Sakamoto](https://appshunter.io/developer/6779044478) |

## What reviewers say

### iCalendar

[App page](https://appshunter.io/ios/app/icalendar/id492076105)

**Currently charting:** #51 Top Paid · Productivity (US App Store)

This productivity app offers a seamless and highly usable interface for managing your schedule. It integrates with popular accounts, allows for custom color-coding, and provides powerful search and productivity tools. Additional features like a task manager and access to interesting calendars are available via in-app purchases.

**Highlights:** Seamless integration with iCloud, Google, Exchange, Outlook, Yahoo!, Customizable color-coding for events, Drag and drop event timing updates, Task manager with iOS Reminders sync, Time zone support and print functionality, Export views as PDF, One-touch conference call dialing

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calendar Store | $1.99 | per year |
| Religious holidays | $0.99 | one-time |
| Week Numbers | $0.99 | one-time |
| Moon Phases calendar | $0.99 | one-time |
| Holidays United States | $0.99 | one-time |
| Calendars - Pro Football USA 2014-2015 edition | $0.99 | one-time |
| Calendars - Pro Baseball USA 2015 edition | $0.99 | one-time |
| iOS Reminders | $0.99 | one-time |
| Calendars - Pro American Football Men United States 2015-2016 edition | $0.99 | one-time |
| Weather calendars | $1.99 | one-time |

**What reviewers like**

- 💻 Excellent calendar app
- 🎨 Customizable color coding
- 📅 Comprehensive monthly view
- 🗓️ Seamless syncing across devices
- 🔍 Detailed event information

**What reviewers complain about**

- 🐛 Occasional data loss or sync issues
- 🔍 Difficulty editing recurring events
- 🔒 Concerns about security and privacy
- 💰 Paid features that should be free
- 🕰️ Inconsistent event time display

**Reported bugs**

- Events disappearing or not syncing properly
- Inability to edit or update recurring events
- Incorrect time and location information
- Crashes or freezes when performing certain actions

**Requested features**

- Add ability to attach files to events
- Improve widget functionality and visibility
- Introduce family/group calendar sharing
- Expand color palette and theming options
- Add yearly view and better month-to-month navigation


### Calendar Op.2

[App page](https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896)

Organize your daily schedule with a clean and minimalist calendar app. It offers seamless event management, synchronization with popular services, and a user-friendly interface for a simpler planning experience.

**Highlights:** Works with built-in iOS calendar, Month & list view with event titles, Mini pop-up for daily events, Seamless vertical scrolling, Copy & Paste for events, Incremental search, Syncs with iCloud, Google Calendar

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient calendar view
- 💡 Customizable color coding
- 🔒 Secure and private
- 🌟 Great alternative to default calendar

**What reviewers complain about**

- 🐛 Issues with date/day synchronization
- 🔍 Limited color options
- 📱 No iPad version
- 🕰️ Can't schedule in 15-minute intervals
- 🔔 Ads can be intrusive

**Reported bugs**

- Events disappearing from past months
- Time zone issues when traveling
- Inability to edit event details

**Requested features**

- Add more color options
- Implement landscape mode
- Allow disabling of irrelevant holidays
- Add support for Apple Watch
- Improve event editing functionality


## Frequently asked questions

### Is iCalendar free?

iCalendar costs $2.99, and also offers in-app purchases.

### Is Calendar Op.2 free?

Calendar Op.2 is free to download, with in-app purchases available.

### Which has better reviews, iCalendar or Calendar Op.2?

iCalendar is rated higher. iCalendar averages 4.7 out of 5 from 5.6K ratings, while Calendar Op.2 averages 4.7 from 13K ratings.

### Do iCalendar or Calendar Op.2 have ads?

Calendar Op.2 shows ads; iCalendar does not.

### Which is updated more often, iCalendar or Calendar Op.2?

iCalendar ships an update every 3 months, and Calendar Op.2 weekly. Most recently, iCalendar was updated on November 10, 2026 and Calendar Op.2 on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*