Resale Ceiling Test

Resale Ceiling Test is a pre-sale screen for app builder engagements: before an agency quotes a white-label mobile app, it maps three numbers on one line. First, the resale margin the platform permits (what the client pays minus platform and publishing fees). Second, the customization ceiling, meaning the point where a client request forces custom code the builder cannot express. Third, the exit cost of moving that client's app to another stack once the ceiling is hit. Agencies that skip the test win the retainer and lose the renewal: a client asks for offline sync or a bespoke checkout at month seven, the visual canvas cannot deliver it, and the rebuild lands on the agency's balance sheet. BuildFire's 150+ plugin marketplace and GoodBarber's 190+ extension library raise the ceiling for content and commerce apps, while AppMySite's site-to-app conversion suits brochure-grade scope. Run the test at scoping, price the rebuild risk into the retainer, and the platform dependency named in this category becomes a known line item rather than a surprise.