A quick refresher on Tushy’s offerings to date: The existing Classic and Spa models are compact bidet attachments that you manually screw into the rear of the toilet seat and are equipped with flexible hoses that route (clean!) water from your toilet tank or bathroom sink, through the bidet’s nozzle, and into your bunghole. (They are, IMO, a bit easier to install since you don’t need to toss your old toilet seat — you simply remove it, mount the Tushy to the backplate, and re-attach the seat.) In contrast, the Ace is an electrically-powered bidet meant to replace your standard toilet seat, equipped with sophisticated functions like a seat-warmer, posterior and front-facing nozzles for cleaning both sides of your downtown and what the brand calls a “derri-air” dryer — all brand-new, high-tech upgrades from Tushy’s lower-fi models.

Source: https://www.refinery29.com/en-us/tushy-ace-electric-bidet-review