# RDMS vs Modbus TCP Station

The clearest difference is in-app purchases: RDMS at none against Modbus TCP Station's 2. RDMS also leads on iOS requirement (12.0 vs 15.0). Modbus TCP Station's advantage is device support. On price there is nothing between them.

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

## The numbers

| Metric | RDMS | Modbus TCP Station |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | — | Every 10 days |
| Size | 97 MB | 31 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [广州鲁邦通物联网科技有限公司](https://appshunter.io/developer/1528644825) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### RDMS

[App page](https://appshunter.io/ios/app/rdms/id6448512200)

**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 RDMS free?

RDMS 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.

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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.*