Key features of Hysteria include:

Hysteria客户端 is a web-based application developed by Hysteria Inc. (now part of Qualtrics) designed to help users track and manage their sexual health. It includes tools for tracking sexual activity, such as tracking dates when you engage in sexual activity with different partners or individuals.

1. Sexual Activity Tracking: Users can log when they have sex with different partners, including when they have sex with someone they know (SFK)