QuickTune H4 is a tuning calculator for Forza Horizon 4 developed by Markus Hein. This program is designed to help Forza Horizon 4 players to easily calculate ready-made balanced and competitive tunes for any car in the game, without requiring any tweaking. QuickTune H4 is packed with features that make it stand out from other tuning calculators. It supports any car in Forza Horizon 4 with any drivetrain swap, and it allows the user to create standard, dirt, cross country, drift, and drag tunes. The program also lets you choose between general purpose or track and season specific tunes, and it supports night, rain, fog, and snow tuning. Advanced settings for adjustment of tune balance and stiffness are also included.