# D vs ONE TAITRA

The clearest difference is update cadence: ONE TAITRA at every 3 months against D's every 7 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.

D ships an update every 7 months, ONE TAITRA every 3 months. The most recent releases landed on September 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | D | ONE TAITRA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Size | 9 MB | 12 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [W&Jsoft](https://appshunter.io/developer/825407107) | [Taiwan External Trade Development Council](https://appshunter.io/developer/485204963) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-security-viewer/id994931877)

**Features:** macOS Compatibility

**In-app purchases:** none


### ONE TAITRA

[App page](https://appshunter.io/ios/app/one-taitra/id1439153494)

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is ONE TAITRA free?

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

### Do D or ONE TAITRA have ads?

Neither D nor ONE TAITRA shows ads.

### Which is updated more often, D or ONE TAITRA?

D ships an update every 7 months, and ONE TAITRA every 3 months. Most recently, D was updated on September 14, 2026 and ONE TAITRA on October 12, 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.*