Has anyone ever heard of Universal Installer?

f-droid.org

Universal Installer | F-Droid - Free and Open Source Android App Repository

Premium APK/XAPK installer with expressive animations, Shizuku & URL downloads.

Worked so well to install an xapk that I could not do natively on GrapheneOS, lets you extract an apk from your apps you have installed as well. Very cool, slick and lightweight. But I’d never heard of it, this thing safe to use and trusted by the community?

If not, what’s the go-to alternative?