I don't think any significant number of people do it. I don't use Signal specifically, but I don't even know that there is a way for me to actually do it and t

I don't think any significant number of people do it. I don't use Signal specifically, but I don't even know that there is a way for me to actually do it and then track whether that matches the version the iOS app store loaded on my phone, at least not without jailbreaking the phone.