If "interesting paper" refers to the templates you can use in GoodNotes, you don't actually need a mod to get unique designs. You can import any PDF as a paper template:
for iOS. While these promise "Premium" features for free, they come with significant security risks and functionality trade-offs compared to the official Goodnotes App Understanding the "Mod" Version GoodNotes 5 v5.7.38 Premium Mod -iOS-
While the appeal of "free" premium features is understandable, the threat of identity theft system instability If "interesting paper" refers to the templates you
If you previously purchased GoodNotes 5, you already own the premium features for that version. GoodNotes 5 v5.7.38 Premium Mod -iOS-