Slider controls allow you to customize exposure and contrast. Are there filters? What would a modern photo-editing app be without them. Extras available by digging into your wallet to pay for in-app offerings? What would any modern app be without them. Adobe has two packs available for purchase. The Adobe Looks Pack adds additional filter choices. The Adobe Noise Reduction Pack eliminates "unwanted grain and speckling" from your photographs.
The app is free from the Windows Phone Store, although there are those aforementioned in-app purchases you can make. And when you're done editing your pictures, you can pass them along to friends and family via social media sites like Instagram and Facebook, or by sending a text message.
source: AdobePhotoshopExpress via WMPoweruser