I'm a speech-language pathologist (SLP). That's my official title anyway. People often call me "speech therapist" or "speech teacher." I'm not a huge fan of the official or unofficial terms to be honest. First of all, saying speech-language pathologist is such a mouthful that people usually give me a deer-in-headlights look after I've finally finished saying the whole thing. I'd rather be called a "communication specialist." I mean, "Pathologist?" Really??!! Sounds like I'm trying to make the deceased speak.
The reason I'm bringing this up is because parents often ask me about their child's "speech," meaning that they believe that speech solely consists of how sounds and words are pronounced. But speech is a lot more than that. It's not just about articulation. It's about total communication, i.e. language structure, vocabulary, pragmatics, intonation, and more. In fact, by improving your child's overall communication skills, articulation may be improved indirectly since the child is actually verbalizing more often and thus, able to practice different articulation patterns more often.
So, when parents ask me what kinds of products (or, nowadays, apps) can improve their child's "speech," I tend to shudder. Before I had children, I made tons of flashcards, games, etc. for parents to use at home. Now that I have two wonderful children, the fact that we're all just trying to make it through the day with as few tantrums, melt-downs, and messes as possible has hit me square in the face. I have found that parents tend to want "stuff" in order to prove they are doing something. I fall into this trap all of the time. “Oh,” I think, “my boy will love to color if I just buy him these really cool crayons.” (Yeah, he could care less.) There is nothing wrong with trying some games at home, but children tend to be put off by the fact that Mom or Dad is now trying to push them into doing something that is really tough for them. Both parties may get frustrated or the presentation of material could be inauthentic.