# Modbus Viewer vs HP Smart Printer App PrintScan

The clearest difference is in-app purchases: Modbus Viewer at none against HP Smart Printer App PrintScan's 3. Modbus Viewer also leads on update cadence (every 2 days vs monthly). HP Smart Printer App PrintScan's advantage is iOS requirement (15.0 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. HP Smart Printer App PrintScan sells 3 in-app purchases, starting at $2.99 per 7 days. Modbus Viewer asks for nothing beyond the download.

Modbus Viewer ships an update every 2 days, HP Smart Printer App PrintScan monthly. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Modbus Viewer | HP Smart Printer App PrintScan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Size | 7 MB | 81 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Erdem Bilgicer](https://appshunter.io/developer/1824808762) | [Muhammad Bilal](https://appshunter.io/developer/1835252795) |

## What reviewers say

### Modbus Viewer

[App page](https://appshunter.io/ios/app/modbus-viewer/id6748247211)

**Features:** macOS Compatibility

**In-app purchases:** none


### HP Smart Printer App PrintScan

[App page](https://appshunter.io/ios/app/hp-smart-printer-app-printscan/id6761515197)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $8.99 | per month |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is Modbus Viewer free?

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

### Is HP Smart Printer App PrintScan free?

HP Smart Printer App PrintScan is free to download, with in-app purchases available.

### Do Modbus Viewer or HP Smart Printer App PrintScan have ads?

Neither Modbus Viewer nor HP Smart Printer App PrintScan shows ads.

### Which is updated more often, Modbus Viewer or HP Smart Printer App PrintScan?

Modbus Viewer ships an update every 2 days, and HP Smart Printer App PrintScan monthly. Most recently, Modbus Viewer was updated on September 17, 2026 and HP Smart Printer App PrintScan on September 24, 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.*