In "I walk you", "walk" is a transitive verb and "you" is the direct object. It does not mean that I am walking at all. It does not mean that I am with you. I could be talking to you over the telephone. It means that I am making you walk. It is as if you were a puppet and I were pulling your strings. In "I walk with you", "walk" is an intransitive verb. There is no direct object. It means that I am walking and you are walking with me. Both of us are walking.

Certainly! The phrase "I will walk you through the App" is a common expression in English, and it doesn't mean physically walking with someone. Instead, it is an idiomatic expression that means the speaker will guide or explain something to you step by step. In this context, "walk you through" is used to convey the idea of leading someone through a process or explaining something in a detailed and systematic way. The use of "walk you through" in this sense is a figurative expression, and it's commonly used in professional settings, such as during presentations, training sessions, or when explaining how to use a software application, like in your example. So, while "walking with you" might imply a physical activity, "walk you through" implies a more metaphorical action of guiding someone through a process or explaining something in a detailed manner. It's just a convention of language use in certain contexts to convey a specific meaning.