# Slock SA 4.0 vs Viet Smart

Slock SA 4.0 and Viet Smart are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Slock SA 4.0 | Viet Smart |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 20 months |
| Monetization | — | Free |
| Size | 9 MB | 184 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Toan Dinh Xuan](https://appshunter.io/developer/1504241769) | [Quoc BInh Tran](https://appshunter.io/developer/1672750199) |

## What reviewers say

### Slock SA 4.0

[App page](https://appshunter.io/ios/app/slock-sa-40/id1630382772)

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

**In-app purchases:** none


### Viet Smart

[App page](https://appshunter.io/ios/app/viet-smart/id6630367389)

This app provides personalized interior design and model home consultation. It helps users visualize living spaces and make informed decisions about furniture and layout for optimal functionality and style.

**Highlights:** Personalized interior design simulation, Model home layout consultation, Furniture selection guidance, Space configuration optimization, Functional living space planning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Slock SA 4.0 free?

Slock SA 4.0 is free to download, with no in-app purchases.

### Is Viet Smart free?

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

### Do Slock SA 4.0 or Viet Smart have ads?

Neither Slock SA 4.0 nor Viet Smart shows ads.

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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.*