GRRO is an AI-powered web app developed by grro, focusing on AI marketing. Specifically designed for podcasters, GRRO aids in audience growth through cross promotions. Utilizing the podcast audience grader, powered by Echo's Audience Graph, podcasters can evaluate their podcast's performance within target topics and against other podcasters. The tool provides in-depth audience analysis by monitoring listening habits and tailors cross promo recommendations based on audience interests and engagement topics.

Podcasters can access these recommendations to enhance their cross promotional strategies, and export them as a CSV file for actionable campaigns. Noteworthy is the free cross promo recommendations feature, offering instant audience expansion opportunities. Despite lacking specific pricing details, GRRO promises upcoming enhanced features. Overall, GRRO empowers podcasters with data-driven insights to understand their audience better and implement effective cross promotional campaigns for audience growth.