If you need Simply Modbus Master for professional or frequent use: ($99 is reasonable for a specialized industrial tool). If you just need a quick test: use the 30-day free trial . If you cannot pay anything: use QModMaster or pyModbus .
To activate, you simply click the "Enter Key" button on the demo startup screen and paste your code. Pricing at a Glance
Licensing for Simply Modbus is typically based on the number of users or PCs. Prices are usually listed in . License Type Estimated Price Single Program 1 License (1 User/PC) Two Programs 1 License (1 User/PC) Three Programs 1 License (1 User/PC) Site License Unlimited (Single location)
The software is sold under a perpetual license model, meaning there are no ongoing subscription fees. As of recent listings, the standard pricing is as follows: Single Program (e.g., RTU Master) Bundle (Any 2 Programs) Full Suite (All 3 Programs) 2 Licenses (2 PCs/Users) Site License