# CalendarDuo vs Dynamic Calendar

The clearest difference is in-app purchases: CalendarDuo at none against Dynamic Calendar's 1. CalendarDuo also leads on review sentiment (50% vs 23%) and iOS requirement (15.1 vs 17.0). Dynamic Calendar's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Dynamic Calendar sells 1 one-off in-app purchase. CalendarDuo asks for nothing beyond the download.

CalendarDuo ships an update every 4 months, Dynamic Calendar every 3 weeks. The most recent releases landed on June 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | CalendarDuo | Dynamic Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/dynamic-calendar/id6578435786/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | **50.0% of reviews** | 22.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 41 MB | 49 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Chun Lam](https://appshunter.io/developer/1565498900) | [Tianjin Nankai Xuewei Technology Studio (Individually Owned Business)](https://appshunter.io/developer/1516740726) |

## What reviewers say

### CalendarDuo

[App page](https://appshunter.io/ios/app/calendarduo/id1589593639)

Easily manage and view holidays from two different countries simultaneously. This utility app offers instant switching between calendars, a dual-view display, and helpful tools like a world clock and currency exchange.

**Highlights:** Switch between two world calendars instantly, Duo-view with holidays from two countries, Daylight Saving Time dates, Currency exchange rate, World clock, Add notes

**Features:** macOS Compatibility

**In-app purchases:** none


### Dynamic Calendar

[App page](https://appshunter.io/ios/app/dynamic-calendar/id6578435786)

Manage your schedule efficiently with this ad-free tool. View calendars and tasks via desktop widgets, sync with your system calendar, and get reminders for holidays and make-up workdays. Enjoy a smooth user experience for all your scheduling needs.

**Highlights:** Widget calendar view (daily, weekly, monthly), Holiday and make-up workday reminders, System calendar synchronization, Schedule list view, Ad-free experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime VIP | $3.99 | one-time |


## Frequently asked questions

### Is CalendarDuo free?

CalendarDuo is free to download, with no in-app purchases.

### Is Dynamic Calendar free?

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

### Do CalendarDuo or Dynamic Calendar have ads?

CalendarDuo shows ads; Dynamic Calendar does not.

### Which is updated more often, CalendarDuo or Dynamic Calendar?

CalendarDuo ships an update every 4 months, and Dynamic Calendar every 3 weeks. Most recently, CalendarDuo was updated on June 24, 2026 and Dynamic Calendar on September 22, 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.*