Gravatars are great as they are a visual cue and reference for your online identity – it’s hard to imagine blogs without this signal now that they have been around for some time!
Managing them is typically done through the web interface but now there’s another mobile alternative called iGravatar that allows you to manage it via your iOS device (Android coming soon).
Upload images directly for your use, assign them to the right email address, and be on your merry way:
It’s not free but for $.99 it might be a nice to have app for those that manage multiple gravatars / accounts and have the constant itch to change things up a bit.
You can learn more at their website, which is sparse, and honestly that’s really not that much more to it.