Yahoo announced Sept. 28 they have launched a Flickr app available for free in the Android Market, and it allows users to share photos across platforms in real time.

The tool is called Photo Session and lets users on separate devices view the same photos together. Additionally, Yahoo can make up for the limited functionality of its iOS app if they add this to it, and that would let them directly take on Instagram, the start-up who's quickly built up a huge following by making it super easy to share photos on Facebook and Twitter.

As a leading brand in mobile, Yahoo! is committed to making sure that Flickr users have the richest, most engaging experiences on every device, Yahoo's Markus Spiering, head of product for Flickr said in a statement.

Instagram doesn't have an Android app, so this may not be a direct answer by Yahoo, but it seems to be going in that direction. Besides the Photo Session tool, the Flickr app has 10 new filters that let you design your own creations that you can then more easily share on Facebook and Tumblr. That does sound more like what Instagram has become known for, so Yahoo may yet have some fight in it despite all the rancor at the top.

Earlier in September, Yahoo CEO Carol Bartz was fired and CFO Tim Morse has taken over as interim CEO. Yahoo is now reportedly looking at various offers for some or part of the company to sell.

Other features Flickr rolled out with the app are the ability to draw on your photos and chat at the same time.

Learn more about the Photo Sessions tool in this video from Yahoo.