What's a good Android app for easily connecting with international researchers for quick chats about preliminary findings?

As academics, we often need to quickly connect with colleagues across the globe to discuss nascent research ideas or clarify points in their work. "Live Fun" presents an interesting implementation of real-time video chat that could serve this purpose. The cross-platform availability is particularly appealing, ensuring compatibility regardless of whether my collaborators are on Android or iOS. I could envision using this to quickly brainstorm with researchers in different time zones. While the app's focus seems broader than just academia, the potential for facilitating quick, informal discussions makes it worth investigating. The app's 4.3 rating suggests a degree of reliability, though a more thorough examination of its privacy policies would be necessary before incorporating it into my workflow. It could also be pedagogically sound to use for virtual office hours.