# IoT RTU vs Modbus TCP Station

The clearest difference is in-app purchases: IoT RTU at none against Modbus TCP Station's 2. IoT RTU also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). Modbus TCP Station's advantage is update cadence (every 10 days vs monthly). On price and device support there is nothing between them.

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

IoT RTU ships an update monthly, Modbus TCP Station every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | IoT RTU | Modbus TCP Station |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | — |
| Size | 8 MB | 31 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [朝山 马](https://appshunter.io/developer/596304901) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### IoT RTU

[App page](https://appshunter.io/ios/app/iot-rtu/id1268543236)

This app provides remote monitoring and control for industrial M2M and IoT devices. It utilizes cellular networks like GSM, GPRS, 3G, 4G, and NB-IoT for seamless communication.

**Highlights:** Remote monitoring, Industrial M2M control, IoT device management, Cellular network support, GSM, GPRS, 3G, 4G, NB-IoT compatibility

**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 IoT RTU free?

IoT RTU 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 IoT RTU or Modbus TCP Station have ads?

Modbus TCP Station shows ads; IoT RTU does not.

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

IoT RTU ships an update monthly, and Modbus TCP Station every 10 days. Most recently, IoT RTU was updated on October 24, 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.*