Refcat/frame0.appUI reference · adA sleek Balsamiq alternative low-fi wireframing tool for modern apps. - Hand-drawn style - in frame0.app1 screen · frame0.appAdded to Refcat Oct 25, 2026Every screen in orderPatternsShoppingXVideoComponentsbuttonExplore real product flowsA sleek Balsamiq alternative low-fi wireframing tool for modern apps. - Hand-drawn style -Explore the full catalog