# Viet Smart vs smark lock

The clearest difference is update cadence: smark lock at every 4 months against Viet Smart's every 20 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.

Viet Smart ships an update every 20 months, smark lock every 4 months. The most recent releases landed on June 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Viet Smart | smark lock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 184 MB | 40 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Quoc BInh Tran](https://appshunter.io/developer/1672750199) | [震 王](https://appshunter.io/developer/1734329851) |

## What reviewers say

### 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


### smark lock

[App page](https://appshunter.io/ios/app/smark-lock/id6752854176)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Viet Smart free?

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

### Is smark lock free?

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

### Do Viet Smart or smark lock have ads?

Neither Viet Smart nor smark lock shows ads.

### Which is updated more often, Viet Smart or smark lock?

Viet Smart ships an update every 20 months, and smark lock every 4 months. Most recently, Viet Smart was updated on June 24, 2026 and smark lock on September 9, 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.*