You can import filters made by other users into the Polarr app through the 2 following ways:
1. "Filters" -> "Import filter"
2. Tap the "+" icon in the upper right
Polarr supports importing filters in 4 different ways: importing QR code, scanning QR code, batch importing, and shortcode entry.
After a successful import, you will find the following:
You can save filters in 2 ways.
1. You can tap "Edit with filter" to save the filter and continue editing your photo. You will be able to find your filter under "Filters", "By Others"
2. You can also save the filter by tapping the bookmark icon. The filter will be saved to your filter collection.