# DUC Sampling 2 vs VMS

The clearest difference is update cadence: VMS at every 2 months against DUC Sampling 2's every 45 months. DUC Sampling 2's advantage is iOS requirement (13.0 vs 15.6). 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, VMS every 2 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | DUC Sampling 2 | VMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 2 months** |
| Size | 20 MB | 37 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Duyen Nguyen Thi My](https://appshunter.io/developer/1504184285) | [VIETTEL BUSINESS SOLUTIONS CORPORATION – BRANCH OF VIETTEL GROUP](https://appshunter.io/developer/953409998) |

## What reviewers say

### DUC Sampling 2

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

**Features:** macOS Compatibility

**In-app purchases:** none


### VMS

[App page](https://appshunter.io/ios/app/vms-viettel-camera-platform/id6449327360)

**Features:** macOS Compatibility, Vision Pro support

**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 VMS free?

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

### Do DUC Sampling 2 or VMS have ads?

Neither DUC Sampling 2 nor VMS shows ads.

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

DUC Sampling 2 ships an update every 45 months, and VMS every 2 months. Most recently, DUC Sampling 2 was updated on October 2, 2026 and VMS on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*