You might save $10, but the cost could be exponentially higher. Here are the real risks of sideloading the GoodNotes 5 v5.7.38 Premium Mod.
In mid-2023, a “GoodNotes 5 v5.7.30 Premium Mod” distributed via a Telegram channel was found to upload Documents/GoodNotes/ content to a Firebase bucket without user consent. v5.7.38 mods originating from unknown signers likely continue similar behavior. GoodNotes 5 v5.7.38 Premium Mod -iOS-