Single-purpose calculators and checks for tradespeople, operators and small-business owners. Each one does exactly one job and does it honestly.
Claims vs Evidence Verifier →
Test delivery, liveness, credential, config and external-receipt claims against fresh evidence at the layer each claim describes; export a portable JSON receipt.
Job Profitability & Break-Even Calculator →
Find your true break-even billable rate from labor burden, overhead and crew utilization, then price any job to a real net margin.
Scope-Creep & Change Order Cost Calculator →
Add up the hidden admin, schedule-delay and overhead costs buried in a construction change order so you charge the true price.
Cold Email Deliverability Preflight →
Check your SPF, DKIM and DMARC records and lint your outbound copy for spam triggers before you hit send.