Using presets is possible with the help of Adobe Lightroom on the computer and mobile. Presets "fall" differently on each photo depending on the lighting, colors, etc., but you can make your own adjustments.
The exchange and return of presets is impossible, as well as cash.
After payment, you will receive an email with attachments, where there will be presets and video instructions for their use. When buying a package of presets, you get a selection of mobile applications that I use when creating content (video effects, collages, scuff effects, etc.).