Yes. Calcium is free to download from Modrinth and free to host on an Orca server you can share with friends. There is no paywall to download or play it.

How do I install Calcium?

The fastest way is Orca: press Play and Orca installs Calcium with Fabric and the right Minecraft version, then launches the game. To do it by hand, download Calcium from Modrinth, install Fabric, and drop the .jar into your mods folder.

Which mod loader does Calcium use?

Calcium runs on Fabric. When you host or play it with Orca, the matching loader and Minecraft version are selected for you automatically.

Can I play Calcium with friends?

Yes. Host Calcium on a free Orca server and share the invite, or launch it solo from the Orca app. No control panel or setup required.

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Calcium

Name: Calcium
Author: Maya

by Maya

2.4K downloads11 followers

ModcursedoptimizationFabric

Host Calcium Edit Calcium

Calcium is a cursed and optimization Minecraft mod from Maya with 2.4K downloads on the Orca catalog. It runs on Fabric, so it slots into a matching Minecraft profile without hand-patching anything. Calcium is free to download and free to host on Orca: press Play and Orca launches Minecraft with Calcium already installed, or host it on a free server to play with friends. There is no control panel and no config files to edit, and no command line to learn. Describe what you want in plain English and Orca installs Calcium along with the loader and Minecraft version it needs, then you and your friends are playing in minutes.

The best ever optimization mod ever ever and ever fps++ (april fools joke - not functional!)

How to install Calcium

Two ways to add Calcium to Minecraft. One takes a click.

The Orca way

Click Play below. Orca installs Calcium with Fabric and the right Minecraft version, then launches straight into the game.

That’s it. Nothing to download or configure.

Host Calcium

The manual way

Download Calcium on Modrinth

Download the latest Calcium file from Modrinth for your Minecraft version.
Install Fabric and launch Minecraft once so the loader profile is created.
Drop the downloaded .jar into your mods folder (the mods folder inside .minecraft, or your server's mods folder).
Add any libraries Calcium depends on (the Modrinth page lists them) into the same folder, then start Minecraft on the Fabric profile.

Calciumversions & compatibility

Calcium targets Fabric. Orca matches the right loader and Minecraft version for you when you host or play it, so you never have to line them up by hand. For the full list of supported Minecraft versions and required dependencies, check the Modrinth page.

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