# CTDT DN vs CPV Online

The clearest difference is update cadence: CPV Online at every 3 weeks against CTDT DN's every 2 months. 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.

CTDT DN ships an update every 2 months, CPV Online every 3 weeks. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CTDT DN | CPV Online |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 36 MB | 12 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vietnam Directorate of Market Surveillance](https://appshunter.io/developer/1466459453) | [TRI NAM GROUP JOINT STOCK COMPANY](https://appshunter.io/developer/1526781987) |

## What reviewers say

### CTDT DN

[App page](https://appshunter.io/ios/app/ctdt-dn/id1543665555)

**Features:** macOS Compatibility

**In-app purchases:** none


### CPV Online

[App page](https://appshunter.io/ios/app/cpv-online/id1543856490)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CTDT DN free?

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

### Is CPV Online free?

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

### Do CTDT DN or CPV Online have ads?

Neither CTDT DN nor CPV Online shows ads.

### Which is updated more often, CTDT DN or CPV Online?

CTDT DN ships an update every 2 months, and CPV Online every 3 weeks. Most recently, CTDT DN was updated on October 15, 2026 and CPV Online on October 16, 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.*