# GDT Calendar vs EcommFAT

The clearest difference is update cadence: GDT Calendar at every 5 months against EcommFAT's every 12 months. GDT Calendar also leads on iOS requirement (10.0 vs 15.1). 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, EcommFAT every 12 months. The most recent releases landed on October 12, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | GDT Calendar | EcommFAT |
| --- | --- | --- |
| 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 12 months |
| Monetization | Free | — |
| Size | 15 MB | 20 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [General Department of Taxation](https://appshunter.io/developer/923910706) | [ecommfat](https://appshunter.io/developer/1684057438) |

## 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


### EcommFAT

[App page](https://appshunter.io/ios/app/ecommfat/id6448217020)

**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 EcommFAT free?

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

### Do GDT Calendar or EcommFAT have ads?

Neither GDT Calendar nor EcommFAT shows ads.

### Which is updated more often, GDT Calendar or EcommFAT?

GDT Calendar ships an update every 5 months, and EcommFAT every 12 months. Most recently, GDT Calendar was updated on October 12, 2026 and EcommFAT on September 21, 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.*