What's the best Android app for printing documents directly from my phone without using a computer?

HP Smart is an Android application designed specifically for mobile printing with HP printers, allowing users to output documents, photos, and web pages directly from their smartphones. This eliminates the intermediate step of transferring files to a computer, which is beneficial for scenarios like printing boarding passes from email, contracts from cloud storage, or school assignments on the go. The app includes practical features such as duplex printing, page range selection, and quality adjustments, giving users control over their print jobs. Reviews indicate that the interface has improved with recent updates, making it more intuitive for navigating settings. However, user feedback points to compatibility issues, particularly after device resets or on newer Android versions—some reports mention connection failures with Wi-Fi printers on models like Vivo V9 or Xiaomi 14T. Additionally, the integrated ink subscription service has drawn criticism for inconsistent delivery, which can be a drawback for those relying on automatic refills. Despite these limitations, HP Smart remains a reliable choice for its core functionality, reducing digital clutter and streamlining workflows. It integrates well with HP's ecosystem, though potential users should verify device compatibility and monitor for app updates to ensure smooth operation.