# Modbus Poll — Modbus TCP/RTU Master & Slave

> Modbus TCP/RTU Master & Slave (iPhone/iPad app by Dzulfikar Ats Tsauri.)

- Source: https://appshunter.io/ios/app/modbus-poll/id6767509445 (this page in markdown: same URL + `.md`)
- Developer: [Dzulfikar Ats Tsauri](https://appshunter.io/developer/1886079973)
- Category: Utilities, Developer Tools
- Price: $24.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 12 MB
- Languages: American English
- Released: 2026-05-21
- Data updated: 2026-11-03

## What is Modbus Poll?

Modbus Poll reads, writes and simulates Modbus TCP devices from your iPhone or iPad. Connect to a PLC, power meter, drive or inverter on your network and watch every register update live.

MASTER
• Modbus TCP
• Read coils, discrete inputs, input registers and holding registers
• Write single and multiple coils and holding registers
• Data types: INT16, UINT16, INT32, FLOAT32 and FLOAT64
• Word order AB CD, CD AB or BA DC; decimal, hex or binary display; 0- or 1-based addresses
• Several read blocks per device, polled together
• Modbus exception codes shown on the rows they affect

SLAVE SIMULATOR
• Run a Modbus TCP slave on your device
• Device templates with live, changing values: Schneider Electric PM5560, SMA STP 60-US-10, Endress+Hauser Promag 10W, ABB AZL402, Emerson Daniel 1000 and a Raritan PDU
• Lock a register to hold its value while the rest keep changing

DIAGNOSTICS
• Traffic log with every request and response decoded
• Live trend chart for any register
• Scan a subnet for devices listening on port 502
• Saved connection profiles

Modbus TCP only: RTU and RS-485 serial are available in the Mac version.

Voltrus Connect subscriptions renew automatically until cancelled in your Apple Account settings.
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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: $24.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Voltrus Connect Monthly | $4.99 | per month |
| Voltrus Connect Yearly | $39.99 | per year |


## Is Modbus Poll safe?

Not enough ratings yet to assess Modbus Poll.

## Is Modbus Poll legit?

Modbus Poll has limited verification signals. The AppsHunter Legitimacy Score for Modbus Poll is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.3.5 — 2026-11-02

No release notes.

## More apps by Dzulfikar Ats Tsauri

- [JoyoRogo: Calorie Tracker](https://appshunter.io/ios/app/joyorogo-calorie-tracker/id6823222101)

All apps by Dzulfikar Ats Tsauri: https://appshunter.io/developer/1886079973

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-03.*