Unified vs TCP ModBus
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Unified
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This app allows hosting different HMIs to monitor and control a plant or machine. You can create the HMIs with the Unified-E App Designer and publish them on the Unified-E App Manager. Unified-E is a software product which is used to operate machines or plants with a smartphone. App development time is drastically reduced by using the "Unified-E App Designer" software, where you can define both the HMI views and push notifications for your individual HMI app. No app programming knowledge is required. There is a Gateway PC required which connects smartphone with machine and ensures that communication is secured and only granted for authorized users. The "Pro" license also allows operating a machine via the Internet without performing any configuration on the firewall or router. By now there are already multiple Unified-E endpoint adapters, e. g. for the S7-, ControlLogix-, Modbus- or OPC UA interface. The software, user manuals, licenses and further information can be found on the website ww.unified-e.com. For developers and integrators all licenses are for free.
TCP ModBus
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TCP Modbus - the application created for testing and debugging of systems supporting TCP ModBus protocol. Simulation sensors, send control commands, read data registers, and others. - Operation as a server or a client; - supports two modes slave and master; - reading and writing data register; - storage of the last session of the data; - storage connection settings; - support decrypting of incoming message.
Screenshots
Verdict
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.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
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.
| Parameter | Unified | TCP ModBus |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 | 8.0 โ better |
| Further details โ not scored | ||
| Size | 184 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Unified-E AG | ะขะะฃ |
In-app purchases
Unified
No in-app purchases
TCP ModBus
No in-app purchases









