Philips Sonicare vs KnowKnow AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Philips Sonicare
Improve your brushing technique with personalized feedback and guidance. Connect your smart toothbrush to track habits, receive insights, and ensure complete oral hygiene for a healthier mouth and confident smile.
- Personalized brushing insights
- Real-time guided brushing
- SenseIQ technology adaptation
- Mouth mapping and guidance
- Brushing habit tracking
- Automatic brush head reordering
- Apple Health integration
Read full descriptionHide full description
Do you remember when you learned to brush? Neither do we! It turns out, most people don’t brush properly. If you’ve ever wondered how well you’re brushing or if you’re reaching every spot, the Philips Sonicare app is here to help. The app brings more clarity, more confidence and more personal insights into your routine. When you connect your Sonicare toothbrush, you’ll unlock personalized coaching designed to help you strengthen your habits and brighten your smile. Please note you must have a connected toothbrush to use the app. By connecting to the app, you’ll also receive the latest updates to your brushing experience. Our most advanced toothbrush – the Next-Generation Sonicare DiamondClean 9900 Prestige – harmonizes with the app, creating an experience that’s smart and supportive, including: - Real-time guided brushing that helps you feel confident every session - SenseIQ technology that senses and adapts to you - Auto-sync so your brushing data stays updated, even when your phone’s not around Your Sonicare app experience will vary depending on which toothbrush you own and where you live: PREMIUM - Next-Generation DiamondClean 9900 Prestige, Next-Generation DiamondClean 9500, Next-Generation DiamondClean 9000, Next-Generation DiamondClean 8700, Next-Generation DiamondClean 8500, Next-Generation DiamondClean 8000 and DiamondClean Prestige 9900 — SenseIQ, mouth map, personalized guidance and tips. ADVANCED - DiamondClean Smart and FlexCare Platinum Connected – mouth map with position guidance and missed area notifications. ESSENTIAL - Sonicare 6500, Sonicare 7100, DiamondClean 9000 and ExpertClean - SmarTimer and brushing guides. In the Sonicare app: Brushing check-in You will receive an assessment of your technique after the first time you brush your teeth. This will provide a starting point to track improvements to your oral health routine over time. Real-time brushing guidance The Sonicare app checks your habits, like if you’re reaching all areas of your mouth, how long you brush or how much pressure you’re using, and coaches you with tailored advice. This coaching helps to ensure consistent, complete coverage, every time you brush. Dental Diary The Dental Diary helps you track all your oral health habits in one place – brushing, flossing, tongue cleaning, and mouth rinsing – so you can spot trends and build a consistent routine. Brushing Streak The Brushing Streak feature helps motivate you to brush at least twice daily – morning and night – as recommended by dentists to prevent plaque buildup. Dashboard The Dashboard syncs with your Sonicare toothbrush to collect and display your brushing habits. You receive an easy-to-read report with insights to help support and improve your oral health. Brush head monitoring Automatically know when it’s time to replace your brush head. Bristles wear out and start losing effectiveness after about three months, so having a fresh replacement ensures the best cleaning. Automatic brush head reordering service Always have a fresh brush head when you need one. As the Sonicare app checks your brush head’s usage, the reordering service reminds you when you need a replacement, and can automatically place an order so it arrives just in time. The brush head smart reordering service is available in the United States, United Kingdom, Germany, France, Spain, Italy and Japan. Connect with Apple Health When you link the Sonicare app to the Apple Health app, you can track your brushing habits along with the rest of your health data.
KnowKnow AI
Effortlessly track your nutrition by simply snapping a photo of your food. This AI-powered tool provides instant analysis of calorie and macronutrient content, helping you understand your dietary intake.
- AI-powered food analysis
- Instant calorie and macro breakdown
- Photo-based tracking
- Nutrition insights
Read full descriptionHide full description
AI-powered nutrition tracker — snap a photo, get instant calorie & macro analysis. Terms of Use: https://knowknow.app/terms Privacy Policy: https://knowknow.app/privacy
Screenshots
Verdict
The clearest difference is review sentiment: KnowKnow AI at 100% against Philips Sonicare's 32%. KnowKnow AI also leads on update cadence (every 3 weeks vs every 2 months). Philips Sonicare's advantage is rating (4.8 vs 3.0) and in-app purchases (none vs 4). On price, ads, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. KnowKnow AI sells 4 in-app purchases, starting at $9.99 per month. Philips Sonicare asks for nothing beyond the download.
Philips Sonicare holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Philips Sonicare has 57K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 32% of Philips Sonicare's written reviews are positive against 100% of KnowKnow AI's, so the app with the better star average is not the one people write more warmly about.
Philips Sonicare ships an update every 2 months, KnowKnow AI every 3 weeks. The most recent releases landed on October 19, 2026 and October 3, 2026 respectively.
| Parameter | Philips Sonicare | KnowKnow AI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (57K ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 31.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 57K — better | 2 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | #157 — better | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 210 MB | 104 MB |
| Age rating | 4+ | 4+ |
| Developer | Philips | RETOWER TECH PTE. LTD. |
Customer experience
Philips Sonicare
KnowKnow AI
Bugs and requests
Philips Sonicare
Reported bugs
5 issues- App crashes when connecting to toothbrush
- App fails to recognize brushing in certain areas
- App loses connection to toothbrush frequently
- Firmware updates cause app to stop working
- App doesn't sync brushing history accurately
Requested features
5 requests- Add Apple Watch integration
- Allow customization of brushing settings
- Improve app responsiveness and stability
- Provide better feedback on missed brushing areas
- Enable offline brushing data tracking
KnowKnow AI
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Philips Sonicare
No in-app purchases
KnowKnow AI
- KnowKnow Plus$9.991 Month
- KnowKnow Pro$14.991 Month
- KnowKnow Plus Yearly$113.991 Year
Show 1 moreShow fewer
- KnowKnow Pro Yearly$178.991 Year









