Android Modbus Master/Client and Slave/Server for phones and tablets. The Modbus Monitor utility is simple but have many advanced features unmatched even by PC based standards. This is the only Modbus App in the Android store with three Apps in one!
Use the opportunity to download the installation package of Modbus Monitor Advanced 3.0.1 free of charge and have a look at users' reviews on Droid Informer. It's secure to download the app. This application has been originally developed by Hubble Software and it is included in the Tools category.