Yes, both FlowMapp and UX-App offer a Free Trial.
FlowMapp is designed for Large Enterprises, Medium Business and Small Business.
UX-App is designed for Individuals, Medium Business and Small Business.
Pricing for FlowMapp Starts at $8.25/Month when Billed Yearly whereas for UX-App Starts at $9/User/Month.
Some top alternatives to FlowMapp includes Miro, FigJam, UX-App, UX Metrics, Uizard, SmartDraw, Gliffy, Microsoft Visio, Creately, VisualSitemaps, UpDiagram and diagrams.net.
Some top alternatives to UX-App includes Figma, FigJam, UXPin, Justinmind, UXCam, UserX, UX Metrics, MockupTiger, Fluid UI, Mockplus, Uizard and Proto.io.