While you can download the app for free, using it requires one of Adobes Creative Cloud plans (Photoshop Photography Program, Complete, Student and Teacher Edition, and Complete for Teams); there is no option to purchase the app on its own without a subscription. (The least expensive option is the Photoshop Photography Program, which at $9.99 per month includes Photoshop CC, Lightroom 5, and Lightroom mobile.) If youre not sure you want to commit to a Creative Cloud plan just yet, you can always sign up for a 30-day trial.