Our verdict: The Oral-B iO Series 4 Rechargeable Electric Toothbrush ranks 8th of the 10 electric toothbrushes we compare, with 8.4 out of 10.
Oral-B iO Series 4 Rechargeable Electric Toothbrush
8.4/10
The Oral-B iO Series 4 is a rechargeable round-head brush with four modes, a pressure light and a travel case. It suits people who want iO cleaning with a sensitive setting and no app.
Four modes: daily clean, whiten, sensitive and super sensitive
Pressure sensor lights up when you press too hard
Travel case and charger in the box
Slim charging base and a handle that suits most hands
Keep in mind
No app connection or position tracking
iO heads cost more than older Oral-B heads
Why the Oral-B iO Series 4 scores 8.4
Each bar shows where it places among the 10 electric toothbrushes in this guide, so a full bar is 1st of 10. How happy owners are counts for most of the score.
How happy owners are8th of 10
How many rated it9th of 10
How new it is5th of 10
Why it sits behind the Oral-B iO Series 5 Rechargeable Electric Toothbrush
The Oral-B iO Series 5 Rechargeable Electric Toothbrush (8.7) beats the Oral-B iO Series 4 Rechargeable Electric Toothbrush (8.4) because it leaves owners a little happier.
About the Oral-B iO Series 4
The iO Series 4 is a mid-range model in Oral-B's iO line. It uses magnetic iO drive with micro-vibrations in a round head, and Oral-B claims 6x more plaque removal along the gumline than a manual brush. It has four modes: Daily Clean, Whiten, Sensitive and Super Sensitive.
A built-in 2-minute timer pauses every 30 seconds so you move to the next quadrant. A light ring on the handle works as the pressure sensor: Oral-B says it shows optimal pressure and warns when you brush too hard. An independent review describes it as white for too little, green for right and red for too much. The handle has no mode icons or display, so you cycle through modes by feel. It also signals when the head needs replacing, which Oral-B says to do every 3 months or sooner if worn.
The box has the handle, a charger with a magnetic base, a travel case and replacement heads. Oral-B's page lists two heads, though Best Buy and Target describe one, so check the listing you buy. Only iO-series heads fit the handle, and older Oral-B heads will not.
What owners report about the Oral-B iO Series 4
Owners at Target describe a thorough clean, with teeth that feel smooth afterward and, for some, healthier-feeling gums. The pressure light and timer help people brush more gently and for the full two minutes. Owners also call it quiet, light and easy to use, and say the battery lasts a long time between charges. The travel case is a popular extra.
Complaints are fewer but real. Some owners report units that stopped charging after several months, and a replacement charger did not fix it for at least one. Several report dark residue in the head or base, which they put down to trapped water. Oral-B says this comes from damp storage or harsh cleaners. Some want a second head in the box, and some feel the price is high for what you get. A few find it loud or awkward in a small mouth.
Owner feedback available for this exact model was limited to one retailer's reviews, so treat these as patterns from a small sample.
Who the Oral-B iO Series 4 suits
It suits people who want an Oral-B iO brush with a sensitive mode and a pressure light, and who will use the travel case. The slim base and handle fit most hands. It is a fit if you do not care about tracking your brushing in an app.
Look elsewhere if you want position tracking or a display, or if you want to avoid pricier iO heads and a non-removable battery. For a cheaper Oral-B, the Oral-B Pro 1000 is the lower-cost pick. For more features, the Oral-B iO Series 5 steps up. If you prefer a sonic brush, the Philips Sonicare 5300 has several modes.
Questions about the Oral-B iO Series 4
How do you use the Oral-B iO Series 4 toothbrush?
Put the head on the handle, press the power button, and guide the head slowly along each tooth without scrubbing. The timer pulses every 30 seconds to move you to the next quadrant of your mouth, and the light ring shows if you press too hard.
What modes does the Oral-B iO Series 4 have?
Four: Daily Clean, Whiten, Sensitive and Super Sensitive, according to Oral-B. Some retailer Q&A answers mention other mode names, but Oral-B's own US page lists these four.
How long does the Oral-B iO Series 4 battery last?
Oral-B's page gives no runtime. Best Buy's Q&A says up to two weeks with twice-daily two-minute brushing, and a full charge takes about 16 hours. An independent review measured about 18 days.
Do Oral-B iO Series 4 replacement heads fit older Oral-B handles?
No. The iO handle takes only iO-compatible heads, and older Oral-B heads do not fit. Replace the head about every 3 months.
What warranty does the Oral-B iO Series 4 have?
Oral-B gives 2 years from the purchase date and replaces defects free of charge. It excludes cosmetic damage, normal wear, misuse, water damage, unauthorized repairs and failure to recharge, and in-warranty service needs a dated receipt.
Other electric toothbrush picks
The other badge winners in our electric toothbrushes ranking.
Every score here comes from our ranking model; no editor sets the order. Too few review sites cover electric toothbrushes for their verdicts to lead, so this ranking is led by owners. It ranks products by how happy owners are, holding back any product few owners have rated until more agree. How many rated it and how new it is only settle close calls, and value for money earns its own badge rather than a higher place. We compared 20 models for this guide before settling on these ten.
Brands can't pay to be included or to move up. We last checked these picks in November 2026.
