The add-on works seamlessly with Cycles and Eevee but i highly recommend Cycles for rendering.

A lot! You can adjust strand count, length, curvature, spread, clumping, randomness, and others from the panel. The system is non-destructive, so you can tweak and regenerate until you get the perfect result.

Absolutely. Hair Card Studio has editable shader setups with root-to-tip color gradients, gloss controls and other material settings.

Hair Card Studio is designed to be beginner-friendly. Even if you’ve never worked with hair cards before, titles and features are so easy to access that you don't need anything.

Hair Card Studio is compatible with Blender 4.0 and above. It may also work in Blender 3.6, but a few features could behave differently or have minor bugs. For the best experience, we recommend using the latest stable release of Blender.

Using Hair Card Studio you can make hair cards and render them but there's no Bake option as of now so it can't be fully game-ready, but you can use this tool to generate maps like normal map and others: https://cpetry.github.io/NormalMap-Online/

Hair cards are flat polygon strips with hair textures applied to them — a common method for creating realistic hair that’s optimized for real-time rendering, video games or animation.