Norma trades the plastic tap-to-block devices on the market for a machined steel disc, but the underlying idea is the same: apps you've chosen stay blocked until you physically scan the disc against your phone. There's no subscription and no battery — it runs on NFC and Apple's built-in Screen Time framework, so nothing runs in the background and there's no performance cost.

Focus modes group blocked apps by context — work, sleep, dinner — so one scan sets the right restrictions for whatever you're about to do, and a Mac sync extends the same block list to browser distractions on desktop.