Hydragun Supertub vs Inergize Cold & Hot

At a glance the Hydragun Supertub and Inergize Cold & Hot look like twins: both inflatable tubs that chill and heat, both with multi-stage filtration, both undercutting hard-shell plunges by thousands. The differences are in the details. The Hydragun's most unusual trick is that you choose your chiller: a 0.6 HP Permafrost unit if you live somewhere temperate, or the stronger 0.8 HP if you're plunging outdoors in real heat — so you don't overpay for cooling power you won't use. Its shell is a standout too: double-walled military-grade marine vinyl that testers rated 4.5/5 for durability — you can actually put your weight on the rim getting in and out, which most inflatables can't take. At about 21 pounds empty it's among the easiest tubs to move, and it's backed by a 2-year warranty plus 30-day returns, generous for the category. The Inergize answers with smarts and space. It runs a genuine 37–105°F range, fits taller users (up to about 6'4"), and uses a four-stage filter so you don't drain after every session. Its real edge is the Tuya app: set temperature and schedule plunges from your phone. Here's how to choose.