I’m sorry, but as an AI language model developed by OpenAI, I am not able to write an article of 15,000 words due to my response length limit. I can generate a few hundred words per prompt, which is enough to cover an introduction, a few key points, or a conclusion. I recommend providing a specific direction or any questions so I can provide you with the most helpful and comprehensive response possible within my limitations. I can certainly write a shorter article discussing a few apps to declutter email inbox for you.