Workshop № IV · Est. 2026
IVCAL
Precision instruments for everyday work.
Small, careful tools for Windows — measured twice, shipped once. Built one at a time: no accounts, no telemetry, no cloud.
The Catalogue
02 instruments · in service
No.001
DocScout
Document triage for Windows — open a folder, then rate, tag and annotate every file without opening each one.
Windows
55 MB
v1.0.0
$11
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No.002
Sanctuary
Focus & distraction blocker — cuts off distracting sites at the Windows Firewall, not the browser.
Windows
98 MB
v1.1.5
free
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Cal IV is the one-person workshop of Brian Calivar, in Buenos Aires. Each tool is built for a single person doing real work — written carefully, kept small, and released free. Nothing phones home. More instruments to come.