RepairAmigo

RepairAmigo is free repair shop management software for phone, tablet and computer repair shops: repair tickets and intake, customer records, parts inventory, receipts and warranty tracking.

Your team uses it from browsers on the shop network while the data stays on a computer you control.
Install: download the one-click installer for your computer. Windows 10/11 (64-bit): RepairAmigo-Setup.exe. Intel Mac with macOS 10.13 or later: RepairAmigo-Setup-Mac.dmg (Apple M1-M4 Macs are not supported). The installer installs VirtualBox (on Mac, the version that matches your macOS), downloads the RepairAmigo VM (release 1.09) in English, Spanish, Portuguese or Hindi, imports it, sets bridged networking and starts it.
The installers are not code-signed yet, so Windows SmartScreen and macOS Gatekeeper show a warning the first time. Step-by-step help: https://repairamigo.com/guides/install-repairamigo-windows-mac/
Program type: Freeware. Cost: $0. No subscription and no credit card to download.
Back up the entire VM and run it on another computer as easily as you installed it.