There are two extensions by Hangout available on Google Chrome web store (ext1 & ext2).
Both versions and app sizes are the same. Why have they got two extensions then?
Best Answer
Only Google can say for sure, but it seems to me that it is likely there were two different extensions originally, and they've been able to merge the codebases. Perhaps one had been originally for Chromebooks and the other for Chrome on other OSes.
And, while they've been able to make them identical, some people will have one installed and some the other. Rather than forcing some people to go through the process of uninstalling one and installing the other, they just made it so they're both the same. (They have, in the past, done it the other way, and it generated a lot of complaints and, I'm sure, a lot of people who didn't install the newer one.)
I don't believe this is going to be an easy task. If you view the Developer Tools Catagory source code. You will notice that the store's "heavy lifting" is implemented in https://chrome.google.com/webstore/static/1367528764/wall/js/webstore.js which is a minimized javascript application that is quite extensive. One way to get the desired information would be to reverse engineer this javascript application until you discover just how google queries/loads the list. Once this is accomplished you should be able to query google and retrieve a list yourself then programmatically count the results.
I hope there is a simpler solution for this otherwise good luck!
App packs are packages of apps that an admin can install for its users. Here are the details from the page on the pre-installed app-packs:
You can pre-install apps on your users' managed Chrome devices so that they see the apps from their apps list when they're signed in to their Chrome devices.
Best Answer
Only Google can say for sure, but it seems to me that it is likely there were two different extensions originally, and they've been able to merge the codebases. Perhaps one had been originally for Chromebooks and the other for Chrome on other OSes.
And, while they've been able to make them identical, some people will have one installed and some the other. Rather than forcing some people to go through the process of uninstalling one and installing the other, they just made it so they're both the same. (They have, in the past, done it the other way, and it generated a lot of complaints and, I'm sure, a lot of people who didn't install the newer one.)
They recently changed the Hangouts extension so that it acts more like the smartphone app. That's probably part of it.