This app makes PDG's Particle Physics Booklet available on your phone, even when you have no Internet access. The Particle Physics Booklet is the abridged version of the Review of Particle Physics published by the Particle Data Group (PDG). It provides the PDG averages and fit values for particle masses, widths or lifetimes, branching fractions, and other important quantities, as well as essential tables, figures and equations from selected PDG review articles. This is the official Booklet app from PDG. It will be updated whenever new editions of the Review of Particle Physics are published. The current version of the app provides the latest Particle Physics Booklet extracted from the Review of Particle Physics, S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024).