AquaSonic Black Series Vs Oral-B iO Series 7
Side by side on motion, gums, braces, pressure sensor, battery, heads, app and three-year cost. The short answer comes first.
Our call: for most people, the AquaSonic Black Series. Pick the Oral-B iO Series 7 instead if this is you: Gum Care plus a color screen, if you will not go all the way to Series 9.
AquaSonic Black Series
About $40 · ranked #5 of 17
Our pick in this pair
- SonicMotion
- 30 daysBattery
- NoPressure sensor
- n/aThree-year cost
Best for: a sonic kit with years of heads in the box, if you do not need a pressure sensor.
Check today's AquaSonic Black Series price →
Oral-B iO Series 7
About $220 · ranked #11 of 17
The alternative
- Oscillating-rotatingMotion
- 14 daysBattery
- YesPressure sensor
- $316Three-year cost
Best for: Gum Care plus a color screen, if you will not go all the way to Series 9.
Check today's Oral-B iO Series 7 price →Price buttons are Amazon affiliate links. A commission does not change which brush wins this page. Disclosure.
Where Do They Differ?
| Where they differ | AquaSonic Black Series | Oral-B iO Series 7 |
|---|---|---|
| Street price | $40lower | $220 |
| Motion | Sonic | Oscillating-rotating |
| Pressure sensor | No | Yes |
| Battery | 30 dayslonger | 14 days |
| Modes | 4 | 5 |
| App | No | Oral-B app |
| Heads per year, about | n/a | $32 |
| Three-year cost | n/a | $316 |
Only the lines where the two brushes differ. A tinted cell is the plain better number on that line: cheaper, longer, or the feature is there.
Jump to a question
- How Do They Clean
- Which Is Better For Sensitive Gums
- Which Is Better With Braces
- Which Stops You Brushing Too Hard
- Which Battery Lasts Longer
- Do The Replacement Heads Cross Over
- Which Has An App, Timer Or Screen
- Which Costs Less Over Three Years
- Are They ADA Seal Accepted
- Which One Should You Buy
- Full spec sheet
They do not share a motion, so the first question is feel, and the second is the bill. Specs are researched from manufacturer pages and named 2026 reviews. Where a number was not published, the cell says n/a. Nothing here is a personal bench log. The method is on how we compare.
How Do They Clean?
The AquaSonic Black Series is sonic. The Oral-B iO Series 7 is oscillating-rotating. That changes how each one feels in the mouth.
Sonic, 40,000 vibrations per minute. Sonic vibration, slim handle, sold as a kit with a pile of heads.
Oscillating-rotating, Oral-B does not publish a strokes-per-minute figure for iO. Magnetic iO drive with a color display and Gum Care.
A round oscillating head is a tooth-by-tooth scrub. A sonic head is a sweep, and the fluid it throws is part of the clean. A jet or a water flosser is a third job. Do not score those as if they were the same machine.
Which Is Better For Sensitive Gums?
The Oral-B iO Series 7 has a pressure sensor and the AquaSonic Black Series does not. With sore gums, that is the bigger difference.
Soft mode. No pressure sensor, so technique still matters.
Sensitive mode, but no Super Sensitive on the Series 6 and 7.
Dentists who talk about recession in public usually point at a sonic brush before a round oscillating one, because the sweep feels less sharp on exposed roots. That is a feel call, not a license to skip the pressure sensor. If a brush has no sensor, technique is the whole safety system.
Which Is Better With Braces?
The Oral-B iO Series 7 has the round head, the usual reach around brackets.
Usable. No special ortho head program.
Round head, app map, color display.
Round heads reach the tooth face around a bracket more easily for a lot of people. Long sonic heads cover more enamel per second and bump the wire more often. A built-in flosser helps the gumline under the wire, which a brush alone does not. None of these replace the conversation with your orthodontist. Ask before you aim a jet at hardware.
Which Stops You Brushing Too Hard?
Only the Oral-B iO Series 7 has a verified pressure sensor.
No verified pressure sensor on the Black Series.
3-color 360-degree ring
A hidden sensor that only cuts the pulsations is easy to miss. A light ring you can see in a mirror is the one people actually change behavior for. Adaptive systems that turn the motor down are a step past a warning. No sensor at all means the brush will happily let you scrub a groove into the gum.
Which Battery Lasts Longer?
The AquaSonic Black Series has the longer published runtime: 30 days against 14.
30 days. About 30 days, wireless charging base.
14 days. About 2 weeks. Magnetic charger, about 3 hours. Display shows charge.
Runtime assumes two minutes, twice a day, on a gentler mode. Whitening modes, radios, and jets spend it faster. A NiMH pack that wants an overnight charge is a different product from a lithium handle that is full before dinner.
Do The Replacement Heads Cross Over?
No. The heads do not cross, so refills you already own may not fit.
AquaSonic heads. Eight DuPont heads in the usual kit, which is the real purchase. About n/a a head. The kit includes 8 heads, roughly two years at a 3-month swap. Later refill price is not on the page we verified, so the yearly head column stays n/a instead of pretending the third year is free.
Round iO head only. About $8 a head. iO refill pricing. The handle premium does not buy cheaper heads.
The American Dental Association tells people to change a brush about every three months, or sooner if the bristles splay. Four heads a year is the math we use. A subscription only helps if you were going to buy that brand's head anyway.
Which Has An App, Timer Or Screen?
Only the Oral-B iO Series 7 has an app.
App: no app. Timer: 2-minute timer and 30-second pacer. Handle screen: no.
App: the Oral-B app. Timer: 2-minute timer, pacer, on-handle display. Handle screen: yes.
Apps coach coverage. They do not clean teeth. If you will not put a phone on the sink, a brush that needs the phone for its headline feature is the wrong spend. A timer and a quadrant pacer are the features that change a two-minute session. Quadpacer is Philips's name for that 30-second buzz. Oral-B does the same job without the trademark.
Which Costs Less Over Three Years?
Three-year math needs a verified head price. The AquaSonic Black Series does not have one on file, so that total stays n/a rather than a fake zero.
Handle $40. Head price not verified, so the three-year total stays n/a. Warranty 2 years.
Handle $220 plus about $32 a year in heads: $316 over three years. Warranty 2 years.
Street handle prices here are typical US prices as of October 2026, not a live checkout. A subscription that unlocks a warranty is a cost, not a gift. Read the cancel terms before you count the years.
Are They ADA Seal Accepted?
Both carry a verified ADA Seal.
Accepted, per the manufacturer or a current product page.
Accepted, per the manufacturer or a current product page.
The Seal means the American Dental Association accepted a safety and efficacy file for that product. It is not a ranking, and a missing seal is not a verdict that the brush fails. Some brands never file. Neither brush is a treatment for gum disease. Bleeding that continues after a week of gentle brushing is a dentist appointment, not a mode setting.
Which One Should You Buy?
For most people in this pair, buy the AquaSonic Black Series. Buy the Oral-B iO Series 7 if this sounds like you: Gum Care plus a color screen, if you will not go all the way to Series 9.
Choose it for: a sonic kit with years of heads in the box, if you do not need a pressure sensor.
Choose it for: Gum Care plus a color screen, if you will not go all the way to Series 9.
Editorial rank on this site puts the AquaSonic Black Series ahead. That rank is a buying call. It is not a claim that the other brush cleans worse in a lab we did not run.
What Goes Wrong With Each?
- No pressure sensor. That is the feature dentists keep asking for, and it is missing.
- Replacement-head ecosystem is thinner than Sonicare or Oral-B once the included 8 are gone
- Build and button feel draw more complaints than Philips or Oral-B
- No Super Sensitive mode. Series 5 and Series 8 have it. Series 7 does not.
- A large price jump over Series 5 for a screen and one mode
- Still no floss, no camera, no jet
Full Spec Sheet
| Spec | AquaSonic Black Series | Oral-B iO Series 7 |
|---|---|---|
| Street price | $40 | $220 |
| Motion | Sonic | Oscillating-rotating |
| Movements | 40,000 vibrations per minute | Oral-B does not publish a strokes-per-minute figure for iO |
| Modes | 4 | 5 |
| Mode list | Clean, Soft, Whiten, Massage | Daily Clean, Sensitive, Whitening, Gum Care, Intense Clean |
| Pressure sensor | No verified pressure sensor on the Black Series. | 3-color 360-degree ring |
| Timer | 2-minute timer and 30-second pacer | 2-minute timer, pacer, on-handle display |
| App | No | Oral-B app |
| Handle display | No | Yes |
| Battery | 30 days | 14 days |
| Charge time | n/a | 3 hr |
| Waterproofing | IPX7 | Shower-safe handle. |
| Travel case | Yes | Yes |
| Noise | Standard sonic hum. | iO buzz. |
| ADA Seal verified | Yes | Yes |
| Head price, about | n/a | $8 |
| Heads, year-one estimate | n/a | $32 |
| 3-year cash | n/a | $316 |
| Handle weight | n/a | n/a |
| Warranty | 2 yr | 2 yr |
| Built-in floss or jet | No | No |
| Camera | No | No |
| Subscription heads | No | No |
| Best for | A sonic kit with years of heads in the box, if you do not need a pressure sensor | Gum Care plus a color screen, if you will not go all the way to Series 9 |
How Do These Two Sit In The Wider Rankings?
Sitewide, the brush we point at first is the Oral-B iO Series 3, with the Philips Sonicare 4100 next to it. This pair is one cell in that table. See the best picks by need if you have not picked a motion yet, or open the Brush Finder if budget and gums are the whole question.
External reading that matches a claim on this page: the ADA toothbrush overview for the three-month head swap and the Seal, Oral-B's iO guide for series features, and Dyson's CameraJet page for the 2026 jet brush. A brand page is a spec source, not a referee.
Short Answers
What is the difference between the AquaSonic Black Series and the Oral-B iO Series 7?
The AquaSonic Black Series is sonic. The Oral-B iO Series 7 is oscillating-rotating. That changes how each one feels in the mouth. AquaSonic Black Series: Sonic, 40,000 vibrations per minute. Sonic vibration, slim handle, sold as a kit with a pile of heads. Oral-B iO Series 7: Oscillating-rotating, Oral-B does not publish a strokes-per-minute figure for iO. Magnetic iO drive with a color display and Gum Care. A round oscillating head is a tooth-by-tooth scrub. A sonic head is a sweep, and the fluid it throws is part of the clean. A jet or a water flosser is a third job. Do not score those as if they were the same machine.
Which is better for sensitive teeth, the AquaSonic Black Series or the Oral-B iO Series 7?
The Oral-B iO Series 7 has a pressure sensor and the AquaSonic Black Series does not. With sore gums, that is the bigger difference. AquaSonic Black Series: Soft mode. No pressure sensor, so technique still matters. Oral-B iO Series 7: Sensitive mode, but no Super Sensitive on the Series 6 and 7. Dentists who talk about recession in public usually point at a sonic brush before a round oscillating one, because the sweep feels less sharp on exposed roots. That is a feel call, not a license to skip the pressure sensor. If a brush has no sensor, technique is the whole safety system.
Which is better with braces, the AquaSonic Black Series or the Oral-B iO Series 7?
The Oral-B iO Series 7 has the round head, the usual reach around brackets. AquaSonic Black Series: Usable. No special ortho head program. Oral-B iO Series 7: Round head, app map, color display. Round heads reach the tooth face around a bracket more easily for a lot of people. Long sonic heads cover more enamel per second and bump the wire more often. A built-in flosser helps the gumline under the wire, which a brush alone does not. None of these replace the conversation with your orthodontist. Ask before you aim a jet at hardware.
Do the AquaSonic Black Series and the Oral-B iO Series 7 stop you brushing too hard?
Only the Oral-B iO Series 7 has a verified pressure sensor. AquaSonic Black Series: No verified pressure sensor on the Black Series. Oral-B iO Series 7: 3-color 360-degree ring A hidden sensor that only cuts the pulsations is easy to miss. A light ring you can see in a mirror is the one people actually change behavior for. Adaptive systems that turn the motor down are a step past a warning. No sensor at all means the brush will happily let you scrub a groove into the gum.
How long do the AquaSonic Black Series and Oral-B iO Series 7 batteries last?
The AquaSonic Black Series has the longer published runtime: 30 days against 14. AquaSonic Black Series: 30 days. About 30 days, wireless charging base. Oral-B iO Series 7: 14 days. About 2 weeks. Magnetic charger, about 3 hours. Display shows charge. Runtime assumes two minutes, twice a day, on a gentler mode. Whitening modes, radios, and jets spend it faster. A NiMH pack that wants an overnight charge is a different product from a lithium handle that is full before dinner.
Will replacement heads from one fit the other?
No. The heads do not cross, so refills you already own may not fit. AquaSonic Black Series: AquaSonic heads. Eight DuPont heads in the usual kit, which is the real purchase. About n/a a head. The kit includes 8 heads, roughly two years at a 3-month swap. Later refill price is not on the page we verified, so the yearly head column stays n/a instead of pretending the third year is free. Oral-B iO Series 7: Round iO head only. About $8 a head. iO refill pricing. The handle premium does not buy cheaper heads. The American Dental Association tells people to change a brush about every three months, or sooner if the bristles splay. Four heads a year is the math we use. A subscription only helps if you were going to buy that brand's head anyway.