My city sells EarthMachine backyard composters to residents for cheap - there was one when I got here. I just chuck my apple cores, egg shells, avocado pits, etc. into a basket lined with newspaper, and then just throw the paper in with them (it's compostable too). There's no smell even if it gets furry in the heat, so long as no oils, meat, or bones are included (although if you don't take it out daily, you can definitely get fruit flies, and you don't want stuff getting furry if you're allergic to mold!)

Love, Columbine