However, a one-time In-App purchase will allow you to save color corrected media without a watermark.
Want to edit photos directly from the "Photos" app? Simply select a photo, tap "Edit -> ...", and then select the SeaReal app from the list of options.
What's new (v1.16.6)
Added a "Select All" button in batch photo selection. Note that this button will only appear when there are 200 or fewer items in the currently selected album.