Files are usually optimized to 3840 x 2160 pixels to perfectly fit the 16:9 aspect ratio of the Frame TV.
Navigate to Art Mode and select "Add Your Photos." TV189 Free Download
Generally priced as a low-cost one-time purchase (often under $5 USD), though "free" listings are rare outside of bundle deals or promotional offers. Files are usually optimized to 3840 x 2160