01 / Download the .ZIP file after your purchase on Gumroad. You can also access your downloads by clicking on the "View Content" link in the confirmation email from Gumroad.
02 / Once the download is complete, press the download icon in the upper right corner of your screen to open the "Files" app on your phone. Press on the downloaded .ZIP file and the content will be extracted and a new folder should automatically appear. If you don't have a "Files" application installed, you can use a free app such as iZip.
03 / Open the Lightroom Mobile app on your iPhone. Click the "+" icon in your library and choose to create new “Folder”. Name the new folder "Presets" and open the folder. Press "Create New Album" and name the album after the downloaded presets, plus "DNG" (e.g. "Montenegro DNG").
04 / Open the album and press the "Add" icon in order to add new images. Navigate to the folder you extracted from the downloaded .ZIP file and select all DNG files in the folder. When you have selected all, choose "Open".
05 / Open the first DNG image and press the icon with the three dots to open the menu and select "Create Preset".
06 / Name your preset after the preset pack (e.g. MN - 01). In "Preset Group", select "Create New Preset Group" and name it after the name of the preset pack. Uncheck "Tools", "Details", "Optics" and "Geometry". Press the tick to create the preset.
07 / Follow the same method as in steps 5 and 6 to create your presets from the other DNG files.
08 / When you are finished, you will now find the presets under the "Presets" panel.