[mamediz]

Without a Raspberry Pi, at least you can use the wolfram engine for free [0] and integrate with your applications, although without all the benefits of the wolfram notebooks environment.

[0] https://www.wolfram.com/engine/

[cosmotic]

As long as your application is not commercial.

[mamediz]

Indeed, but I believe that if one develop a commercial application that uses Wolfram language then they would think it is worth to pay for it.