# INCHSTONE OPC Browser vs Modbus TCP Pro

The clearest difference is price: INCHSTONE OPC Browser at Free against Modbus TCP Pro's $11.99. INCHSTONE OPC Browser also leads on in-app purchases (none vs 1) and iOS requirement (15.0 vs 26.1). Modbus TCP Pro's advantage is update cadence (every 5 weeks vs every 3 months). On ads and device support there is nothing between them.

INCHSTONE OPC Browser is free to download; Modbus TCP Pro costs $11.99 up front. Modbus TCP Pro sells 1 one-off in-app purchase. INCHSTONE OPC Browser asks for nothing beyond the download.

INCHSTONE OPC Browser ships an update every 3 months, Modbus TCP Pro every 5 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | INCHSTONE OPC Browser | Modbus TCP Pro |
| --- | --- | --- |
| Price | **Free** | $11.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 126 MB | 2 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [INCHSTONE GmbH](https://appshunter.io/developer/1480423246) | [Bernard Struelens](https://appshunter.io/developer/1802500832) |

## What reviewers say

### INCHSTONE OPC Browser

[App page](https://appshunter.io/ios/app/inchstone-opc-browser/id6599836514)

**In-app purchases:** none


### Modbus TCP Pro

[App page](https://appshunter.io/ios/app/modbus-tcp-pro/id6756293575)

This tool allows professionals to test, read, and write Modbus registers directly from their iPhone. It offers robust connectivity and support for various data types, making it ideal for field testing and debugging industrial control systems.

**Highlights:** Modbus TCP connectivity, Read and write registers, Support for multiple data types, Configurable Unit ID, Instant feedback and error reporting, Designed for testing and debugging, Field testing without a laptop

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Modbus Pro | $24.99 | one-time |


## Frequently asked questions

### Is INCHSTONE OPC Browser free?

INCHSTONE OPC Browser is free to download, with no in-app purchases.

### Is Modbus TCP Pro free?

Modbus TCP Pro costs $11.99, and also offers in-app purchases.

### Do INCHSTONE OPC Browser or Modbus TCP Pro have ads?

Neither INCHSTONE OPC Browser nor Modbus TCP Pro shows ads.

### Which is updated more often, INCHSTONE OPC Browser or Modbus TCP Pro?

INCHSTONE OPC Browser ships an update every 3 months, and Modbus TCP Pro every 5 weeks. Most recently, INCHSTONE OPC Browser was updated on November 4, 2026 and Modbus TCP Pro on November 5, 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.*