# GDT Calendar vs NSW Authenticator

The clearest difference is update cadence: NSW Authenticator at every 2 months against GDT Calendar's every 5 months. GDT Calendar's advantage is iOS requirement (10.0 vs 15.6). 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.

GDT Calendar ships an update every 5 months, NSW Authenticator every 2 months. The most recent releases landed on September 17, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | GDT Calendar | NSW Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/gdt-calendar/id926656830/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 15 MB | 97 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [General Department of Taxation](https://appshunter.io/developer/923910706) | [General Department of Customs and Excise of Cambodia](https://appshunter.io/developer/1218176128) |

## What reviewers say

### GDT Calendar

[App page](https://appshunter.io/ios/app/gdt-calendar/id926656830)

This app provides a comprehensive guide to Cambodia's tax return deadlines and public holidays. It details the start and end dates for various tax types, offering timely alerts for self-assessment taxpayers. Stay informed about important dates for patent tax, VAT, and more.

**Highlights:** Tax return start and deadline notifications, Alerts for self-assessment system, Covers various tax types (Patent, VAT, Profit, etc.), Includes Cambodia public holidays, Lists Buddhist days, Information on Property Tax and Withholding Tax

**Features:** macOS Compatibility

**In-app purchases:** none


### NSW Authenticator

[App page](https://appshunter.io/ios/app/nsw-authenticator/id6748083605)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GDT Calendar free?

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

### Is NSW Authenticator free?

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

### Do GDT Calendar or NSW Authenticator have ads?

Neither GDT Calendar nor NSW Authenticator shows ads.

### Which is updated more often, GDT Calendar or NSW Authenticator?

GDT Calendar ships an update every 5 months, and NSW Authenticator every 2 months. Most recently, GDT Calendar was updated on September 17, 2026 and NSW Authenticator on September 13, 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.*