Oral-B iO3 Review: A Pressure Ring, a Travel Case, and Head Prices That Run Backwards

What £55 covers, and why the £160 does not matter

The box holds one handle, one Ultimate Clean head, one travel case and one charger. Three modes and the three-state pressure ring come with it. Four colours are listed at £55 with no separate pricing, so the colour is not a way to pay more.

The £160 recommended price is worth naming only because of what it says about the storefront. Nothing on the page puts an end date on the 66 per cent gap, four colours share the price, and the same store shows its two-pack of heads 60 per cent under an RRP in the same way. The £55 is what the page charged on 5 and 6 November; the number that decides the ownership cost is the head price further down.

Amazon's box carries a spare head and the maker's £55 box does not, so the two prices do not compare in a straight line. The store sells heads in pairs, so the maker's box plus a £12.00 two-pack is £67.00 for three heads, against Amazon's two-head box at £59.99 from Amazon on 5 November and £65.95 from a third-party seller on 6 November. At the 5 November price Amazon was the cheaper way to two heads; at the 6 November price the maker's store gives a third head for about £1 more, and a reader ordering from Amazon should check who the seller is before paying.

The head platform is the purchase, not the handle

Oral-B's own UK head page is blunt about it: the Ultimate Clean head is 'the only brush head designed exclusively for – and guaranteed to fit – your Oral-B iO electric toothbrush'. The CrossAction pack sits in the Pro-style range, which the iO heads do not serve. Oral-B's US FAQ for this handle adds that the iO charging base and the older Pro and Genius bases do not charge each other; the UK pages do not address it.

That matters most in a household that already brushes on an older Oral-B. A ten-pack of CrossAction heads bought at £21.75 is £2.18 a head; every unopened head in the cupboard is money the new handle cannot use. Nobody has to bin them — the realistic version is that the old handle stays on the shelf until the pack runs out, which is a decision about shelf space, and about whether two people now need two kinds of head.

A single-person household replacing a dying handle is the easy case. A couple sharing one refill pack is the hard one: after the switch the pack covers one person, and the second person starts buying iO heads at £6.00 in a two-pack. That is the moment to buy two iO handles, or to finish the old stock first.

The UK head prices run backwards

iO Ultimate Clean heads at Oral-B's UK prices on 5 and 6 November 2026: £12.00 for two, which is £6.00 each, and £110.00 for ten, which is £11.00 each; the six-pack was £72.00 (£12.00 each) on 5 November and showed no price on 6 November. The two-pack is the cheapest per head by a wide margin, which is the opposite of what a bulk-buy reflex expects. Anyone replacing a whole year at once should price two two-packs at £24.00 against a ten-pack at £110.00 and take the two-packs.

CrossAction on the same store: £21.75 for ten, or £2.18 a head, against an RRP of £43.49. Four heads a year — the three-month interval Oral-B prints on the pack — costs £24.00 on the iO route and £8.70 on the CrossAction route. Over three years, at four heads a year, that is £72 against £26.10 for the same number of heads on the older platform.

None of this says the iO head cleans worse. It says the running cost of the iO platform in the UK is nearly three times the running cost of the Pro platform, and that the £55 handle is the cheap part of the decision. The one genuine iO advantage in the price list is that the small pack is the value pack, so a light user is not punished for buying four heads at a time.

The ring, the three modes, and the missing runtime

The visible pressure signal is the feature the store leads with: a ring at the neck that shows too hard, too soft or just right. The three modes are Sensitive, Daily Clean and Whiten, and the timer pulses every 30 seconds for the two-minute recommendation. Oral-B describes the motor as micro-vibrations with individually powered bristles in a round head, and says nothing about what it does when you press too hard beyond lighting the ring.

The runtime is the gap. Neither the maker's page nor the Amazon listing states how many brushes a charge gives; Amazon says only that the cell is lithium-ion, so there is no UK figure to plan charging around. The charger is a two-pin unit on the Amazon box with no adapter included, so a bathroom without a shaver socket needs a plug adapter as well.

The plaque claim is consistent in direction and vague in size: 100 per cent more plaque removed against a manual toothbrush, on both the maker's page and the Amazon bullets. It is measured against a manual brush, never against the older Oral-B handle being replaced, so it cannot tell an existing electric user what the upgrade is worth.

Two shops, two refund windows

The warranties agree: two years from purchase, repair or replacement free of charge, exclusions for wear, cosmetic damage, accident, misuse, unauthorised repair and failure to charge. The refund promises do not agree. Oral-B's UK store runs a 100-day money-back guarantee in its footer and on the product page. Amazon's listing for the same brush carries a 30-day money-back guarantee in its bullet points. Same brand, same model, two windows depending on where you click.

Both are longer than the statutory cancellation right, which gives 14 days from delivery to change your mind on an online order, and both sit on top of the six-month repair-or-replace route for a fault, which does not depend on any guarantee at all. Where the shops genuinely differ is the box and the seller: the maker's £55 set has one head and is sold by THG Ingenuity, Amazon's set has two and was sold by Amazon on 5 November and by a third-party seller on 6 November, and only Amazon's listing says the charger is two-pin with no adapter. The statutory rights run against whoever sold the brush.

Who should buy it, and who should finish the old pack first

Buy it as a first electric brush, or as a replacement for a handle that is failing, when there are no unopened heads in the house. At £55 it brings a case, a pressure ring and three modes, Sensitive among them, and the case is the part that matters if the brush travels.

Do not buy it to sit beside a working Pro-style handle that shares a ten-pack of CrossAction heads. The heads will not cross over, the chargers will not cross over, and the £2.18-a-head supply becomes a single-person supply overnight while the iO user pays £6.00 a head. Finish the old pack, then switch both brushes at once, or wait until the old handle dies.

If the pressure ring is the only feature you want, count it as what £55 buys here, not a better clean: the plaque figures on every page are against a manual brush. Then add the heads, at £24.00 a year in two-packs against £8.70 for CrossAction, before deciding.