Internal Residential and Commercial Window Tint Quote App for IOS

I have a fully-detailed specification and screen mock-ups ready to go for an internal quoting app that will live exclusively on company-issued iPhones and iPads. The core workflow is straightforward: while a technician is on-site, the app must let them capture both rectangular and custom-shaped window sizes, instantly convert the millimetre entries to inches and then to square feet, apply our pricing tables, and finish by producing a branded PDF quotation that can be emailed or saved to the customer record.

All calculations, drawings, and notes need to happen inside the app—no external tools. A simple product-type selector should drive the tint options and their tiered price rules. Each quote ties back to a small customer database stored locally with secure sync to our private server (API ready).

I want this built in Flutter using FlutterFlow so that future tweaks are low-code. Final delivery will include the full Flutter project, FlutterFlow workspace export, compiled TestFlight build, and a brief hand-over video. I will provide the spec, mock-ups, logo assets, and the pricing matrix on contract acceptance; your task is to turn that blueprint into a polished, dependable app that runs smoothly on the current iOS and iPadOS versions and meets Apple’s private distribution requirements.

Please NOTE:

Preference is for Firebase or Supabase with the simplest secure architecture possible.

FULL brief supplied later