# Calendar Op.2 vs Tasks+Cal+Sync 4

The clearest difference is price: Calendar Op.2 at Free against Tasks+Cal+Sync 4's $14.99. Calendar Op.2 also leads on rating (4.7 vs 1.0) and update cadence (weekly vs every 20 months). Tasks+Cal+Sync 4's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Calendar Op.2 is free to download; Tasks+Cal+Sync 4 costs $14.99 up front. Calendar Op.2 sells 1 one-off in-app purchase. Tasks+Cal+Sync 4 asks for nothing beyond the download.

Calendar Op.2 holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Calendar Op.2 has 13K ratings behind it against 2, so its average is the more settled of the two.

Calendar Op.2 ships an update weekly, Tasks+Cal+Sync 4 every 20 months. The most recent releases landed on October 28, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Calendar Op.2 | Tasks+Cal+Sync 4 |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | **[4.7 (13K ratings)](https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/tasks-plus-cal-plus-sync-4/id1166018485/reviews) |
| Number of ratings | **13K** | 2 |
| Positive reviews | 68.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 20 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 8 MB | 8 MB |
| Requires iOS | 26.0 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yoshihiro Sakamoto](https://appshunter.io/developer/6779044478) | [Lukas Zeller](https://appshunter.io/developer/299521020) |

## What reviewers say

### Calendar Op.2

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

Organize your daily schedule with a clean and simple calendar app. It offers a beautiful month and list view with event titles, a mini pop-up for daily events, and seamless scrolling. Easily copy and paste events and search your schedule.

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

**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


### Tasks+Cal+Sync 4

[App page](https://appshunter.io/ios/app/tasks-plus-cal-plus-sync-4/id1166018485)

This app synchronizes contacts, tasks, and calendars using the SyncML standard. It's designed for users who need to connect with older systems or specific organizational requirements that rely on this legacy synchronization technology.

**Highlights:** SyncML synchronization for contacts, tasks, and calendars, App-internal calendar and task management, iOS contact group assignment, Acts as a local SyncML server, Month, day, week, and list calendar views

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

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Op.2 free?

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

### Is Tasks+Cal+Sync 4 free?

Tasks+Cal+Sync 4 costs $14.99, with no in-app purchases.

### Which has better reviews, Calendar Op.2 or Tasks+Cal+Sync 4?

Calendar Op.2 is rated higher. Calendar Op.2 averages 4.7 out of 5 from 13K ratings, while Tasks+Cal+Sync 4 averages 1.0 from 2 ratings.

### Do Calendar Op.2 or Tasks+Cal+Sync 4 have ads?

Calendar Op.2 shows ads; Tasks+Cal+Sync 4 does not.

### Which is updated more often, Calendar Op.2 or Tasks+Cal+Sync 4?

Calendar Op.2 ships an update weekly, and Tasks+Cal+Sync 4 every 20 months. Most recently, Calendar Op.2 was updated on October 28, 2026 and Tasks+Cal+Sync 4 on October 16, 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.*