If you try to download the zip file on your iPhone and get an error saying "unsupported file type", try this:
Click the 3 dot menu on the top right of your screeen, and choose "Open In". It'll take a minute to load, then you can continue with the instructions with "Save to Files."
You could also try downloading them onto your computer first before transferring them to your phone. Here's how to do that:
Step 1: Download presets on your Computer:
- PC --> right-click on the zipped folder and choose "Extract All" from the options menu
- Mac --> double-click the file, and Mac's unzipping utility does the rest
Step 2: From your computer, you can either:
- Upload them to a cloud storage that shares to your phone
- "Airdrop" (iPhone) or "Nearby Share" (Android) the photos to your phone
For complete instructions on how to install and use H&V Presets, please see the complete article here "iPhone: Downloading & Using Your H&V Presets."