Yes, both AppInstitute and Appmaker.xyz offer a Free Trial.
AppInstitute is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Appmaker.xyz is designed for Large Enterprises, Medium Business and Small Business.
Pricing for AppInstitute Starts at $42/Month when Billed Yearly whereas for Appmaker.xyz Starts at $66/Month when Billed Yearly.
Some top alternatives to AppInstitute includes AppYourself, Bizness Apps, A2Zapps, Apphive, Native, geekApps, 2OS App Builder and AppMaster.io.
Some top alternatives to Appmaker.xyz includes SwapToApp, Bizness Apps, GitHub, Native, Applify, Shopney, Natively, Inline Checkout, AppMaster.io and Web As App.