Polar.sh is described as 'Open-source platform that allows developers to monetize their coding projects, similar to Lemon Squeezy. It provides features like an embedded pledge system via a Github app, an organized backlog, and a Chrome extension for better Github Issues experience' and is an app. There are nine alternatives to Polar.sh for a variety of platforms, including Web-based, Android, iPhone, SaaS and GitHub apps. The best Polar.sh alternative is Fiverr. It's not free, so if you're looking for a free alternative, you could try Gitpay or Lemon Squeezy. Other great apps like Polar.sh are Algora, IssueHunt, Forhopp and Feork.