The OSReferee desktop companion

OSTools brings the full referee workflow to Mac.

Prepare regions, manage encounters, use the compendium and dice tools, and run connected table sessions from a native desktop dashboard built from the same design system as OSCharacter.

OSTools campaign region dashboard

One campaign library

Move between OSReferee and OSTools automatically.

Apple CloudKit synchronizes the same campaign library privately across your iPhone, iPad, and Mac. Existing local data is backed up before its first migration.

Encounter runnerCompendium referenceCampaign dashboard

One purchase model

OSReferee limits and entitlements carry over.

The free version uses the same campaign limits as OSReferee. The one-time $4.99 Premium upgrade unlocks unlimited local capacity in both apps. The separate $5.99 monthly OSTools Pro subscription unlocks connected campaign tools in both.