DrawBook offers free browser-based tool for contractor progress payment apps

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A free, open-source web tool called DrawBook has been released to help small general contractors and specialty subcontractors prepare progress payment applications against a schedule of values. The tool handles standard construction billing math — including change orders, retainage, stored materials, and prior draw carryforward — following the G702/G703-style format common in the industry. Unlike costly construction ERP platforms or outdated Excel templates, DrawBook runs entirely in the browser with no account, no analytics, and no server storing job financial data. All project data is saved locally via the browser's localStorage, and users are advised to use the built-in JSON backup export to avoid data loss. The project is MIT licensed, hosted on GitHub, and available to use for free at sybilgambleyyu.github.io/DrawBook.

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