Yes, both nandbox and Shopney offer a Free Trial.
nandbox is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Shopney is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for nandbox Starts at $49/Month whereas for Shopney Starts at $79/Month.
Some top alternatives to nandbox includes Nwicode, Bizness Apps, GitHub, Apphive, AppInstitute, Native, AppMaster.io and Codeless.
Some top alternatives to Shopney includes MobiRoller, apprat.io, Appmaker.xyz, Applify, Vajro, Zappter, Tapcart, 1App and Apptuse.