A self-hosted WordPress site (WordPress 6.0 or newer) running PHP 7.4 or newer. That is it for the core app. A few optional features connect to outside services only if you turn them on: online card deposits use your own Stripe account, the AI tools use your own OpenAI key, and address autocomplete uses a Google Maps key. We also strongly recommend running your site over HTTPS, which the mobile app and online payments require.