Heartbeat is a free community-building app developed by Heartbeat Chat for Android devices. It is a platform where you can create and customize your own invite-only community space for various purposes such as online schools, accelerators, incubators, paid communities, innovation hubs, support groups, and more.

With Heartbeat, you can easily design channels for posts or chats, and voice rooms that help you take your conversations to the next level. You can also create a lasting library of knowledge by turning hot posts into long-lasting knowledge base articles, organizing information vital to your community members, and managing access through powerful permissioning tools native to Heartbeat.

Heartbeat also offers deep integrations with various tools such as Zoom, Google Calendar, Salesforce, Hubspot, Airtable, and more to automate community actions and track deep analytics over time to see how your community is growing. You can also automate in-community match-ups and conversations through customizable, weekly Heartbeat intros, create moderators, special access permissions, manage payments, oversee projects, and more within your customizable community space.

Overall, Heartbeat is an excellent app for building a community and fostering relationships with people who share similar interests.