Video - He cofounded Tumblr and created Instapaper

Marco Arment is an American iOS and Web developer

Marco Arment made his name developing Tumblr, and now he is an indie app developer and technology commentator. He works mainly on Web and iPhone software. Actually he is *the* co-founder of Tumblr, and also created Instapaper and Overcast. An American iOS and Web developer, he is also a technology writer and former magazine editor.