# PP Calendar Reminders vs CalendarDuo

The clearest difference is review sentiment: CalendarDuo at 50% against PP Calendar Reminders's 0%. CalendarDuo also leads on in-app purchases (none vs 1). PP Calendar Reminders's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

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

PP Calendar Reminders ships an update every 2 months, CalendarDuo every 4 months. The most recent releases landed on September 25, 2026 and June 24, 2026 respectively.

## The numbers

| Metric | PP Calendar Reminders | CalendarDuo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (10 ratings)](https://appshunter.io/ios/app/pp-calendar-reminders/id981158014/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 3 MB | 41 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [金鹏 王](https://appshunter.io/developer/981158013) | [Chun Lam](https://appshunter.io/developer/1565498900) |

## What reviewers say

### PP Calendar Reminders

[App page](https://appshunter.io/ios/app/pp-calendar-reminders/id981158014)

Manage reminders and view holidays with this utility app. Easily reschedule, mark as complete, or ignore reminders. Access public, lunar, and region-specific holidays with detailed date information and countdowns.

**Highlights:** Create Gregorian/Lunar reminders, Quickly reschedule reminders, Mark reminders as completed, View public & lunar holidays, Holiday countdown, Sync reminders via iCloud, Widget for quick info

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| More Features | $1.99 | one-time |


### 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


## Frequently asked questions

### Is PP Calendar Reminders free?

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

### Is CalendarDuo free?

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

### Do PP Calendar Reminders or CalendarDuo have ads?

CalendarDuo shows ads; PP Calendar Reminders does not.

### Which is updated more often, PP Calendar Reminders or CalendarDuo?

PP Calendar Reminders ships an update every 2 months, and CalendarDuo every 4 months. Most recently, PP Calendar Reminders was updated on September 25, 2026 and CalendarDuo on June 24, 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.*