# ATSPRO vs Dux calendar

The clearest difference is update cadence: Dux calendar at fortnightly against ATSPRO's every 103 months. Dux calendar also leads on iOS requirement (12.0 vs 14.0). On price, ads, 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.

ATSPRO ships an update every 103 months, Dux calendar fortnightly. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ATSPRO | Dux calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 103 months | **Fortnightly** |
| Size | 14 MB | 57 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [khaled ouali](https://appshunter.io/developer/1189262524) | [All Soft Multimedia](https://appshunter.io/developer/1669478403) |

## What reviewers say

### ATSPRO

[App page](https://appshunter.io/ios/app/atspro/id1189262525)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dux calendar

[App page](https://appshunter.io/ios/app/dux-calendar/id6743619015)

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

**In-app purchases:** none


## Frequently asked questions

### Is ATSPRO free?

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

### Is Dux calendar free?

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

### Do ATSPRO or Dux calendar have ads?

Neither ATSPRO nor Dux calendar shows ads.

### Which is updated more often, ATSPRO or Dux calendar?

ATSPRO ships an update every 103 months, and Dux calendar fortnightly. Most recently, ATSPRO was updated on October 12, 2026 and Dux calendar on October 6, 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.*