# DUC Sampling 2 vs PVCFC Sales

The clearest difference is update cadence: PVCFC Sales at every 11 months against DUC Sampling 2's every 45 months. PVCFC Sales also leads on iOS requirement (9.0 vs 13.0). 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.

DUC Sampling 2 ships an update every 45 months, PVCFC Sales every 11 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | DUC Sampling 2 | PVCFC Sales |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 11 months** |
| Size | 20 MB | 16 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duyen Nguyen Thi My](https://appshunter.io/developer/1504184285) | [PETROVIETNAM CA MAU FERTILIZER CORPORATION](https://appshunter.io/developer/1466901222) |

## What reviewers say

### DUC Sampling 2

[App page](https://appshunter.io/ios/app/duc-sampling-2/id1518756669)

**Features:** macOS Compatibility

**In-app purchases:** none


### PVCFC Sales

[App page](https://appshunter.io/ios/app/pvcfc-sales/id1580032711)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DUC Sampling 2 free?

DUC Sampling 2 is free to download, with no in-app purchases.

### Is PVCFC Sales free?

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

### Do DUC Sampling 2 or PVCFC Sales have ads?

Neither DUC Sampling 2 nor PVCFC Sales shows ads.

### Which is updated more often, DUC Sampling 2 or PVCFC Sales?

DUC Sampling 2 ships an update every 45 months, and PVCFC Sales every 11 months. Most recently, DUC Sampling 2 was updated on November 7, 2026 and PVCFC Sales on November 7, 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.*