# XT UART vs Smart Scale

The clearest difference is in-app purchases: XT UART at none against Smart Scale's 3. XT UART also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Smart Scale sells 3 in-app purchases, starting at $5.99 per 7 days. XT UART asks for nothing beyond the download.

XT UART ships an update every 4 months, Smart Scale every 3 months. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | XT UART | Smart Scale |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 6 MB | 59 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Lanke Xuntong Technology Co., Ltd.](https://appshunter.io/developer/640898259) | [Yorgi Del Rio](https://appshunter.io/developer/1845433622) |

## What reviewers say

### XT UART

[App page](https://appshunter.io/ios/app/xt-uart/id1448659811)

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

**In-app purchases:** none


### Smart Scale

[App page](https://appshunter.io/ios/app/smart-scale-ai-measure/id6758620582)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Annual | $29.99 | per year |
| Scale for Grams Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is XT UART free?

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

### Is Smart Scale free?

Smart Scale is free to download, with in-app purchases available.

### Do XT UART or Smart Scale have ads?

Neither XT UART nor Smart Scale shows ads.

### Which is updated more often, XT UART or Smart Scale?

XT UART ships an update every 4 months, and Smart Scale every 3 months. Most recently, XT UART was updated on October 16, 2026 and Smart Scale on October 25, 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.*