Yes, both AppDemoStore and Axure RP offer a Free Trial.
AppDemoStore is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Axure RP is designed for Large Enterprises, Medium Business and Small Business.
Pricing for AppDemoStore Starts at $20/Month whereas for Axure RP Starts at $25/User/Month when Billed Yearly.
Some top alternatives to AppDemoStore includes Miro, NinjaMock, Balsamiq, Axure RP, Wireframe.cc, Inspireframe, Stage, Mockup Clips, Device Frames, Zen Wireframe and Mockframe by 500apps.
Some top alternatives to Axure RP includes Miro, Adobe XD, HotGloo, Pidoco, NinjaMock, Balsamiq, Wireframe.cc, Claritee, Stage and Zen Wireframe.