Oral-B iO Series vs Xiaomi Mijia T100

The T100 has no pressure sensor whatsoever — if you're brushing too hard, it won't tell you, and most people do brush too hard. The iO Series alerts you in real time, which is exactly why dentists recommend it. Over months and years, brushing with too much force causes gum recession that no toothbrush can fix after the fact.

The cheapest iO model costs roughly 8-10x more than the T100. That's not a small premium — that's a different category of purchase. For someone who's skeptical about electric toothbrushes, spending $80 to find out they don't like it is a real risk. Spending $7 is not. The T100's value isn't that it's great; it's that it's cheap enough to be a trial run.

Multiple community threads specifically call out the iO Series for delivering a noticeably cleaner feel versus manual brushing from day one. The T100 is a solid step up from a manual brush, but it's basic sonic cleaning with no intelligence behind it. The iO's oscillating-rotating-pulsating technology is why dentists keep recommending Oral-B over cheaper alternatives.

The T100's replacement heads are cheap and widely available online, which is a genuine advantage. But Oral-B's iO heads, while more expensive per head, are sold in every pharmacy and big-box store — no waiting on shipping from overseas. If you factor in the iO's durability and the fact that you won't be replacing the handle anytime soon, the total cost of ownership gap narrows considerably over a 3-5 year window.