Your Prototype Is Not Being Honest With Your Users (And Here’s How To Fix It)

Eric Joseph L. May 25, 2026 0 comments Your Prototype Is Not Being Honest With Your Users (And Here’s How To Fix It) 6 min read Prototypes , User Experience , User Interfaces Share on Twitter ,  LinkedIn About The Author Eric is a Creative Technologist at ProtoPie, where he pushes the boundaries of no-code prototyping. With a background in FinTech UX design, he brings firsthand … More about Eric ↬ Email Newsletter Your (smashing) email Weekly tips on front-end & UX . Trusted by 182,000+ folks. There’s a moment in almost every usability session where a participant pauses at the login screen, types something, and glances up: checking whether they’re “doing it right.” That pause is a clear sign. They’ve already clocked that this isn’t a real app, and every data point collected after that moment is filtered through that awareness. This article has been kindly supported by our dear friends at ProtoPie who help users turn their ideas into highly interactive animations and prototypes for mobile, desktop, web, and IoT. Thank you! There’s a moment in almost every usability session where a participant pauses at the login screen, types something, and glances up: checking whether they’re “doing it right.” That pause is a clear sign. They’ve already clocked that this isn’t a real app, and every data point collected after that moment is filtered through that awareness. In financial product testing, the problem is sharper. Finance users are trained to notice when something feels off: a balance that doesn’t add up, a field that accepts anything. When a banking prototype skips real authentication, participants don’t just disengage; they stop mid-session to flag it. The team walks away with findings that reflect how users behave in a demonstration, not in a real product. The fix is narrower than you’d think. Identify the moment where participant trust is established and make that interaction real. In a banking app, that moment is the login. This tutorial builds it: credenti