# Calendar Op.2 vs Simple Calendar Tracker

The clearest difference is rating: Calendar Op.2 at 4.7 against Simple Calendar Tracker's 3.2. Calendar Op.2 also leads on update cadence (weekly vs every 3 months) and ratings volume (13K vs 13). 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.

Both are free to download. Calendar Op.2 sells 1 one-off in-app purchase. Simple Calendar Tracker asks for nothing beyond the download.

Calendar Op.2 holds the better App Store score, 4.7 against 3.2. That said, the two scores are not equally well evidenced: Calendar Op.2 has 13K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 68% of Calendar Op.2's written reviews are positive against 54% of Simple Calendar Tracker's.

Calendar Op.2 ships an update weekly, Simple Calendar Tracker every 3 months. Both last shipped on October 20, 2026.

## The numbers

| Metric | Calendar Op.2 | Simple Calendar Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13K ratings)](https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896/reviews)** | [3.2 (13 ratings)](https://appshunter.io/ios/app/simple-calendar-tracker/id1509155697/reviews) |
| Number of ratings | **13K** | 13 |
| Positive reviews | **68.0% of reviews** | 53.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 18 MB |
| Requires iOS | 26.0 | **14.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yoshihiro Sakamoto](https://appshunter.io/developer/6779044478) | [Kitten Cat LLC](https://appshunter.io/developer/560904530) |

## 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

**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


### Simple Calendar Tracker

[App page](https://appshunter.io/ios/app/simple-calendar-tracker/id1509155697)

Organize your schedule by tracking event occurrences across different calendars. Combine multiple calendars to identify recurring patterns and gain insights into your activities.

**Highlights:** Track event occurrences, Manage separate calendars, Combine calendars, Identify patterns, Schedule organization

**Features:** macOS Compatibility

**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 Simple Calendar Tracker free?

Simple Calendar Tracker is free to download, with no in-app purchases.

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

Calendar Op.2 is rated higher. Calendar Op.2 averages 4.7 out of 5 from 13K ratings, while Simple Calendar Tracker averages 3.2 from 13 ratings.

### Do Calendar Op.2 or Simple Calendar Tracker have ads?

Calendar Op.2 shows ads; Simple Calendar Tracker does not.

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

Calendar Op.2 ships an update weekly, and Simple Calendar Tracker every 3 months. Most recently, Calendar Op.2 was updated on October 20, 2026 and Simple Calendar Tracker on October 20, 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.*