def is_opening_ext_app(text):
    """
    Checks if user wants to open an app.

    Parameters: text (string): user's speech

    Returns: (bool)
    """
    state = False
    keyword = [
        "open", 
        "launch",
        "start"
    ]
    for word in keyword:
        if ((text.lower()).find(word.lower()) != -1):
            state = True
    return state