Save image in different formats

On the Photoshop on iPhone homescreen, select Create new   and then select an option for creating or importing content.

Make the desired edits to the image using the Select Area, Light and color, Effects, or additional tools as needed.

Select Share   > Advanced Export. 

Select the appropriate file format (such as PNG, JPEG, PSD, or TIFF), File size, and Format.

Select Export.