Yes, both apprat.io and AppInstitute offer a Free Trial.
apprat.io is designed for Individuals, Freelancers, Medium Business and Small Business.
AppInstitute is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for apprat.io Starts at $39/Month whereas for AppInstitute Starts at $42/Month when Billed Yearly.
Some top alternatives to apprat.io includes AppYourself, A2Zapps, GitHub, AppInstitute, Applify, Appup by 500apps, Appy Pie, Zappter and AppGyver.
Some top alternatives to AppInstitute includes AppYourself, Bizness Apps, A2Zapps, Apphive, Native, geekApps, 2OS App Builder and AppMaster.io.