An AR mobile app called streetARtAPP gained traction without advertising, attracting over 25,000 unique users in 162 countries in its first month. It was promoted through blog posts and being featured as a Layar layer. While iPhones drove initial growth, Android now accounts for most Layar browser users. Creating apps and embedding the Layar player provides the deepest user engagement. The complexity of supporting multiple devices underscores the need for web and mobile apps alongside AR browsers.