# Modbus Peek & Poke

> Mobile tool for accessing and controlling Modbus devices via TCP/IP. (iPhone/iPad app by Sapia, Inc..)

- Source: https://appshunter.io/ios/app/modbus-peek-and-poke/id541091160 (this page in markdown: same URL + `.md`)
- Developer: [Sapia, Inc.](https://appshunter.io/developer/541091163)
- Category: Utilities, Education
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 7.0 · 3 MB
- Languages: English
- Released: 2012-08-08
- Data updated: 2026-07-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/modbus-peek-and-poke/id541091160/reviews.md

## What is Modbus Peek & Poke?

Modbus Peek & Poke allows you to access the registers, coils and discretes of your Modbus device from your iPhone or iPad.

With Modbus Peek & Poke you can:

- Monitor PLC and remote I/O devices on a LAN or the internet.
- Perform low-level control.
- Perform stress testing.
- Learn about the Modbus/TCP protocol.
- Troubleshoot network and communications problems.
- Perform equipment demonstrations.
- Use for development of Modbus/TCP devices.

## Key features

- Access registers, coils, and discretes
- Monitor PLCs and remote I/O
- Perform low-level control
- Conduct stress testing
- Learn Modbus/TCP protocol
- Troubleshoot network issues
- Equipment demonstrations


## Frequently asked questions about Modbus Peek & Poke

### What is Modbus Peek & Poke used for?

Modbus Peek & Poke allows you to access and control Modbus devices from your iPhone or iPad. It's useful for monitoring PLCs, performing low-level control, stress testing, and troubleshooting network communications.

### What devices does Modbus Peek & Poke support?

Modbus Peek & Poke is available for iPhone and iPad. It allows you to connect to Modbus devices over a LAN or the internet.

### How much does Modbus Peek & Poke cost?

Modbus Peek & Poke is a paid application, priced at $2.99. There are no in-app purchases or subscriptions required.

### Is Modbus Peek & Poke suitable for beginners learning Modbus?

Yes, the app is designed to help users learn about the Modbus/TCP protocol. It provides direct access to device registers and coils, facilitating hands-on learning.

### How often is Modbus Peek & Poke updated?

The latest version of Modbus Peek & Poke is 1.2, released on April 26, 2017. While updates have not been frequent recently, the app has been stable for users.

### What is the age rating for Modbus Peek & Poke?

Modbus Peek & Poke has an age rating of 4+. This indicates it is suitable for a wide audience, though its technical nature makes it most relevant to adults and older teens.

### Does Modbus Peek & Poke have ads?

No, Modbus Peek & Poke does not contain advertisements. As a paid application, it offers an ad-free experience for users.

### What kind of Modbus devices can I connect to?

You can connect to various Modbus devices such as PLCs and remote I/O devices. The app facilitates monitoring and control of these devices over a network connection.

## Version history (last 3 releases)

### 1.2 — 2017-04-26

This app has been updated by Apple to display the Apple Watch app icon.

Fixed a fringe issue with issuing a user request while repeatedly reading from the test tab.
Fixed a fringe issue when a slave sends an odd byte count for the Read Holding Registers (03) and Read Input Status (04) function codes.

### 1.1 — 2014-04-09

Fixed incorrect byte count for Force Multiple Coils (15).  The byte count was always an even number.

Fixed minor scalping of data grid address characters.

Modernized appearance for iOS 7.

### 1.0 — 2012-08-08

No release notes.

## Apps similar to Modbus Peek & Poke

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [BACnet HMI \| HMI5](https://appshunter.io/ios/app/bacnet-hmi-hmi5/id945222220) | 1.0 (2) | $6.99 | Utilities |
| [Dash IoT](https://appshunter.io/ios/app/dash-iot/id1574116689) | — | Free | Utilities |
| [MerryIoT for Amazon Sidewalk](https://appshunter.io/ios/app/merryiot-for-amazon-sidewalk/id6450383664) | — | Free | Utilities |
| [Energy Meter](https://appshunter.io/ios/app/energy-meter/id989638672) | — | $3.99 | Utilities |
| [MSCADAView](https://appshunter.io/ios/app/mscadaview/id1021584307) | — | Free | Utilities |
| [NetTools Pro](https://appshunter.io/ios/app/nettools-pro/id1193051689) | — | $9.99 | Utilities |

---

*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 2026-07-10.*