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.

What’s New

Version 1.2

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.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

App Privacy

The developer, Sapia, Inc., has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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