# HMI vs Modbus TCP Station

The clearest difference is in-app purchases: HMI at none against Modbus TCP Station's 2. HMI also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Modbus TCP Station sells 2 one-off in-app purchases. HMI asks for nothing beyond the download.

HMI ships an update every 3 weeks, Modbus TCP Station every 10 days. The most recent releases landed on October 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HMI | Modbus TCP Station |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 17 MB | 31 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HMI Master](https://appshunter.io/developer/1458107961) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### HMI

[App page](https://appshunter.io/ios/app/hmi-app/id827109131)

**Features:** macOS Compatibility

**In-app purchases:** none


### Modbus TCP Station

[App page](https://appshunter.io/ios/app/modbus-tcp-station/id6757790321)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Premium Pass | $0.99 | one-time |
| Premium Upgrade | $9.99 | one-time |


## Frequently asked questions

### Is HMI free?

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

### Is Modbus TCP Station free?

Modbus TCP Station is free to download, with in-app purchases available.

### Do HMI or Modbus TCP Station have ads?

Modbus TCP Station shows ads; HMI does not.

### Which is updated more often, HMI or Modbus TCP Station?

HMI ships an update every 3 weeks, and Modbus TCP Station every 10 days. Most recently, HMI was updated on October 1, 2026 and Modbus TCP Station on October 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.*