# Unified vs TCP ModBus

The clearest difference is update cadence: TCP ModBus at every 4 days against Unified's every 3 weeks. TCP ModBus also leads on iOS requirement (8.0 vs 12.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unified ships an update every 3 weeks, TCP ModBus every 4 days. The most recent releases landed on September 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Unified | TCP ModBus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 184 MB | 1 MB |
| Requires iOS | 12.2 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Unified-E AG](https://appshunter.io/developer/1084656252) | [ТПУ](https://appshunter.io/developer/1004522612) |

## What reviewers say

### Unified

[App page](https://appshunter.io/ios/app/unified-e/id1084656253)

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

**In-app purchases:** none


### TCP ModBus

[App page](https://appshunter.io/ios/app/tcp-modbus/id1167945569)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unified free?

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

### Is TCP ModBus free?

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

### Do Unified or TCP ModBus have ads?

Neither Unified nor TCP ModBus shows ads.

### Which is updated more often, Unified or TCP ModBus?

Unified ships an update every 3 weeks, and TCP ModBus every 4 days. Most recently, Unified was updated on September 13, 2026 and TCP ModBus on September 27, 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.*