The text highlights a variety of newsletters for Android and iOS developers, offering curated content to help them stay updated with the latest trends, tutorials, and tools in app development. For Android developers, options include Android Weekly, Android Central, and Android Authority, which provide comprehensive updates, news, and resources on a daily or weekly basis. iOS developers can access curated content through newsletters like iOS Dev Weekly, iOS Dev Tools, and Ray Wenderlich, offering insights into development links, tools, and tutorials. Additional resources include NSHipster for Objective-C and Swift topics, Design Code for iOS design, and Little Bites of Cocoa for daily tips. The text also mentions Stack Exchange and Hackernewsletter as supplementary platforms for broader programming discussions and curated posts.