Hi, I am new to Diaspora & have downloaded the app to my mobile device (android). I noticed that the Diaspora app is using lots of data. For example, with only a couple of minutes use, accessing the stream, (not seeing any videos), it used about 60mb of data, including about 500kb background usage. Can anyone explain this to me & how it can be limited? Thank you.
Galaxy S3 mini Android 4.1.2
Hello and welcome, @justinpbrown 
Diaspora doesn’t have any official apps. There are a number of thrid-party apps but basically all they do - they display Diaspora normal mobile pages and add some bells and whistles. It is hard to provide troubleshooting for unknown third-party apps.
I would recommend trying to just open Diaspora in Firefox or Chrome - it will have pretty app-like experience, especially if you create a screen shortcut.
If you really want an app for Android then Dandelion from F-droid store is pretty good. The version in official Play store was a bit obsolete last time I checked it.
Also note that data usage directly depends on what is in your stream. Diaspora mobile view has some optimizations but if your contacts post a lot of high-resolution images (especially if they embed them inline) it will use up traffic but this is the case with any website.
Spc Cw, thanks very much 
The app I have been using is called Diaspora Native WebApp. I prefer not to use apps, so shall hitherto access Diaspora from a browser.
Many thanks for your help.