Ways To Get To Full HP Between Fights

New-ish GM here and looking for ways to heal up the party between fights. I’m an ex-5e DM and finding ways to keep my party alive are way more interesting in PF but also… how? I know about Treat Wounds but from other’s comments it seems like there are more? Potions/Elixirs don’t recover too much. What else is there, aside from class resources/spells? I am aware of Heal & Soothe, looking for free-cost options.