Note that the trend Dario observed still holds – both newly registered tablet and mobile site users are being converted to 5+ editors at a higher rate than desktop.
Slightly concerning is the conversion rate on the Android app – I'd have expected this to be higher, more in line with mobile site editors on phones. We'll need to figure out if this is due to users editing anonymously on the app instead of signing in and counting toward our new active user count.
New user productivity
I was also interested in the volume of contribution we're seeing across each of the platforms, to get a sense of how much new folks are contributing. So I ran the numbers for bytes changed (added, removed, and total changed) by newly registered users across all our different platforms:
Though mobile site editors (both tablet and phone) are reaching 5+ edits at a higher rate than desktop users, it looks like desktop editors make significantly bigger edits in terms of bytes. Not super surprising, given the smaller screen real-estate and greater difficulty in contributing longform text, but it's good to validate that with real data. Note again that Android app editors are on the lower end of bytes contributed.
To me, these two graphs raise the question of whether mobile site editors (on both tablets & phones) make a larger number of small edits as opposed to one big edit like they might on desktop. I don't know if we'll be able to answer that definitively anytime soon, but it's definitely something to think about and dig into more in the future...