We went through the difference between a free and a paid project in this article.
Your first GenieBelt project is free forever on the trial plan. This comes with a few limitations, but is sufficiently enough for you to test out and see if GenieBelt is for you. Your trial project have a file allowance of 50 files and 1 month of audit trail available.
Our website has all the information you need to figure out which plan is right for you: http://geniebelt.com/pricing/