CircleLogix is shop management software for heavy-duty truck, trailer and diesel repair shops. It follows each job from write-up to payment so the next step is always clear: record the mechanic's findings and fault codes, build the estimate with book hours, parts and tax, get it approved and signed by email or link, send it to the bay, then invoice and collect. Mechanics use an app on any phone, tablet or computer that never shows a price. Includes a workboard, inspection forms with measurements and photos, parts and inventory, purchase orders, a calendar for every bay, fleet accounts with units and PM schedules, roles and permissions, QuickBooks Online sync and CSV export. Plans from $149 a month. 30-day free trial, no card, no contract.