Privacy

This page describes Caliber, the Windows desktop app, and this website. Last updated 28 September 2026.

This website

caliber-draft.com serves these pages and the download. It does not ask you to create an account. It does not run analytics. Your browser talks to the host that serves the files, which keeps ordinary connection logs such as an IP address and the page requested. Those logs are not used to build a profile of you.

The app on your PC

Caliber runs on the same computer as the League of Legends client. It reads the local client so it can show the current draft. Champion select itself stays on that PC.

To show ranks and champion records, the download sends the players in that game to Caliber’s server at api.caliber-draft.com. The server asks Riot for rank, champion games, and win rate, then returns those numbers. The Riot API key stays on the server. It is not in the download, and the app cannot see it.

The server keeps a record for about ten minutes so the same player is not requested again during that game. It does not create an account for you, and it does not keep a history of your drafts.

On this PC

A short log of errors may be written to %LOCALAPPDATA%\Caliber\caliber.log. Finished games can be saved in outcomes.jsonl in that same folder as a game id, the predicted probability, and whether the game was a win. Summoner names are not written into that file. Delete %LOCALAPPDATA%\Caliber to remove the log and the saved results.

A Riot key typed into Settings is only for a copy of Caliber you run yourself while developing. The download from this site does not use that key.

Contact

Questions about this policy: hello@caliber-draft.com.