# Đếm Ngày vs Hatomic

The clearest difference is ads: Hatomic at none against Đếm Ngày's shown. Hatomic also leads on update cadence (every 3 months vs every 13 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Đếm Ngày ships an update every 13 months, Hatomic every 3 months. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Đếm Ngày | Hatomic |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Ad-supported | — |
| Size | 63 MB | 46 MB |
| Requires iOS | 13.4 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 17+ |
| Developer | [Manh Nguyen](https://appshunter.io/developer/1427461166) | [Kiet Nguyen Tuan](https://appshunter.io/developer/1647733663) |

## What reviewers say

### Đếm Ngày

[App page](https://appshunter.io/ios/app/em-ngay/id1571033355)

Track your special days and Vietnamese holidays with this app. It offers password protection, historical information, and lunar calendar integration. Count down days by week, month, or year.

**Highlights:** Countdown for special days, Vietnamese holidays and festivals, Password protection, Lunar calendar integration, Day counting by week, month, year, Holiday history and introduction

**Features:** macOS Compatibility

**In-app purchases:** none


### Hatomic

[App page](https://appshunter.io/ios/app/hatomic/id6738987299)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Đếm Ngày free?

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

### Is Hatomic free?

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

### Do Đếm Ngày or Hatomic have ads?

Đếm Ngày shows ads; Hatomic does not.

### Which is updated more often, Đếm Ngày or Hatomic?

Đếm Ngày ships an update every 13 months, and Hatomic every 3 months. Most recently, Đếm Ngày was updated on October 9, 2026 and Hatomic on October 17, 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.*