Hawaii doesn't have a specific auto-renewal law, but the UDAP (no specific auto-renewal law) (Haw. Rev. Stat. § 480-2) plus federal FTC rules protect your right to cancel.
Haw. Rev. Stat. § 480-2
Penalties: Treble damages plus attorney fees
SubScrub automatically cites Haw. Rev. Stat. § 480-2 and federal laws