# GDT Calendar vs KUMI Model

The clearest difference is rating: KUMI Model at 4.5 against GDT Calendar's 4.3. KUMI Model also leads on update cadence (every 2 months vs every 5 months). GDT Calendar's advantage is ratings volume (10 vs 2) and iOS requirement (10.0 vs 13). On price, ads, in-app purchases and monetization model there is nothing between them.

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

KUMI Model holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: GDT Calendar has 10 ratings behind it against 2, so its average is the more settled of the two.

GDT Calendar ships an update every 5 months, KUMI Model every 2 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | GDT Calendar | KUMI Model |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/gdt-calendar/id926656830/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/kumi-model/id6742130731/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 15 MB | 324 MB |
| Requires iOS | **10.0** | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [General Department of Taxation](https://appshunter.io/developer/923910706) | [KUMI CORPORATION LIMITED](https://appshunter.io/developer/1594330775) |

## 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


### KUMI Model

[App page](https://appshunter.io/ios/app/kumi-model/id6742130731)

Sync fitness data like steps and calories from your smartwatch. Receive call and message notifications on your watch. Customize watch faces with your own images and videos.

**Highlights:** Sync fitness data (steps, calories, distance), Incoming call and message notifications, Edit and upload custom watch faces, Image and video editing, Connects with Apple Health

**In-app purchases:** none


## Frequently asked questions

### Is GDT Calendar free?

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

### Is KUMI Model free?

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

### Which has better reviews, GDT Calendar or KUMI Model?

KUMI Model is rated higher. GDT Calendar averages 4.3 out of 5 from 10 ratings, while KUMI Model averages 4.5 from 2 ratings.

### Do GDT Calendar or KUMI Model have ads?

Neither GDT Calendar nor KUMI Model shows ads.

### Which is updated more often, GDT Calendar or KUMI Model?

GDT Calendar ships an update every 5 months, and KUMI Model every 2 months. Most recently, GDT Calendar was updated on October 18, 2026 and KUMI Model on October 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.*