You probably know someone who does it. I’m talking about the friend who can’t start dinner without taking a picture of it first. Or the family member agonizing over which Instagram filter to use before uploading his 100th picture of last night’s sunset. For better or worse, apps like Instagram have made sharing with photos easier than ever by allowing you to do it right from your smartphone. But this week I took a look at a new challenger, Yahoo’s Flickr. You might know Flickr best as a Web service, but Yahoo is making a push in the mobile space, and recently released a major update to its mobile app that puts it more on par with Instagram. Among the big changes to Flickr is the addition of filters. These allow you to apply various effects to your photos to give them an artsy look. You can also now share those images from this app to Facebook, Twitter and Tumblr.