Game Master 5th Edition is a DM tool that simplifies the process of running a Dungeons & Dragons game. It includes a combat tracker that allows you to roll initiative, track hit points and conditions, view monster stat blocks, and roll attacks all in one easy-to-use interface. The encounter builder lets you quickly put together an encounter, including randomly generated enemies, and the encounter analyzer calculates the difficulty to avoid accidentally TPK-ing the party. The creature builder/scaler allows you to easily create or modify a creature by specifying a few stats, and the app will auto-generate the rest of the numbers and text for you.

The DM screen includes a customizable rules reference view that lets you quickly look up rules, tables, and more. The campaign manager allows you to split your campaign into adventures, each with their own sets of characters and encounters, and keep notes and treasure items that you can send out to your players. The dice roller allows you to roll all of your stats and attacks with a tap of a button, and the compendium is a customizable collection of content that includes races, classes, backgrounds, feats, equipment, spells, and monsters from the System Reference Document 5.1. The app is designed to be played with D&D 5e, but many elements of it can be used for other tabletop RPGs, such as D&D 3.5e and Pathfinder RPG.

The premium version of the app is available as an in-app purchase and removes the restrictions of creating a single campaign with one adventure and up to three encounters. The app is also compatible with the Fight Club 5th Edition app, which allows players to send their characters to the DM in the form of an importable file. Fan-made files are also available for download, making it easy to add missing content to the compendium.

Overall, Game Master 5th Edition is a powerful tool for DMs that simplifies the process of running a D&D game and allows you to focus on more important things. With its customizable features and compatibility with other RPGs, it's a great addition to any DM's toolkit.