Yes, both Savah App and Whimsical offer a Free Trial.
Savah App is designed for Large Enterprises, Medium Business and Small Business.
Whimsical is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Savah App Starts at $5/Month whereas for Whimsical Starts at $10/User/Month when Billed Yearly.
Some top alternatives to Savah App includes Airtable, ClickUp, MockApp, Zeplin, InVision, UX-App, Evrybo, Whimsical, Balsamiq, Stage and CoLab.
Some top alternatives to Whimsical includes Miro, NinjaMock, Axure RP, Wireframe.cc, Claritee, Stage, SmartDraw, Zen Wireframe, Collabtools and Witeboard.