As a language teacher . . .
As a language teacher focused on Spanish for 35 years, all electronic means of learning are supports or tools. The best is to obviously work on a language daily where it is used. Not being around Finns who are using the language means reaching out to apps and chat and it works. The app is a tool and the work is keeping up with study in the way you learn best. I am Finnish but was discouraged from learning the language as a child. Cold War era. The app and other online tools are helping restore what was lost. Good enough app.