In fairness to GP, this only became true a few years ago and Signal has not advertised this (nor the fact that you can now download the Signal APK from their we

In fairness to GP, this only became true a few years ago and Signal has not advertised this (nor the fact that you can now download the Signal APK from their website and it auto-updates outside of the play store[1]). Folks who opted to not use Signal some time ago likely had no way of finding this out, and Moxie's comments on this in ~2014 gave the impression that it would never happen. [1]: https://signal.org/android/apk/ https://signal.org/android/apk/