Northline Sheets

Northline Sheets is a small toolkit of offline Excel workbooks and a stdlib Python CSV QA CLI for contractors, landlords, and ops teams. Catch empty columns, duplicate keys, and blank rates before you trust a spreadsheet export — no SaaS login. Free DEMO_report.html sample on request at northline3713@uberip.com. Paid pack: Northline CSV QA — US$19 USDT via NOWPayments https://nowpayments.io/payment/?iid=5762149816. Also job-costing, rent-roll, and fee-net workbooks from US$12. Not an AI product.