The Professional edition of Instrumentation and Automation is a paid analogue of the free verrsion. It is intended mainly for professionals, since it is planned to include narrow profile units of calculations, which for a wide range are redundant, and even harmful (sometimes). No ads displaying.
At present, in addition to all the functions of the basic version added:
Paid and free versions will develop synchronously, the existence of the Professional edition will not affect users of free versions in any way. Both versions will be updated at the same time. Windows and macOS versions are likely to get some additional functions in the form of databases, etc ...
The download link for the Android version leads to Google Play
For iOS and macOS, the PRO version is activated as an In-Application purchase (IAP).
PRO version for Windows is activated from the free version of the program by entering the activation key.
To get the activation key for the Windows: