# CalendarDuo vs TranstrackEDMS

The clearest difference is ads: TranstrackEDMS at none against CalendarDuo's shown. TranstrackEDMS also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CalendarDuo ships an update every 4 months, TranstrackEDMS every 5 months. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CalendarDuo | TranstrackEDMS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Ad-supported | — |
| Size | 41 MB | 32 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chun Lam](https://appshunter.io/developer/1565498900) | [海宏技术有限公司](https://appshunter.io/developer/1457654322) |

## 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


### TranstrackEDMS

[App page](https://appshunter.io/ios/app/transtrackedms/id6566179906)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CalendarDuo free?

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

### Is TranstrackEDMS free?

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

### Do CalendarDuo or TranstrackEDMS have ads?

CalendarDuo shows ads; TranstrackEDMS does not.

### Which is updated more often, CalendarDuo or TranstrackEDMS?

CalendarDuo ships an update every 4 months, and TranstrackEDMS every 5 months. Most recently, CalendarDuo was updated on October 15, 2026 and TranstrackEDMS on October 1, 2026.

---

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