Unfortunately, the search results do not provide a clear and consistent answer to the question "what is Akshay Sadhana." The results include references to a Sadhana for prosperity in life called "Akshay Paatra Sadhana", a LinkedIn post mentioning "Sadhana app", a YouTube channel called "Akshay Sadhana", and a Sadhana for Akshay Tritiya. Without more context or information, it is difficult to provide a comprehensive answer to the question.