# Philips Sonicare vs KnowKnow AI

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.

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.

## The numbers

| Metric | Philips Sonicare | KnowKnow AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (57K ratings)](https://appshunter.io/ios/app/philips-sonicare/id1047099766/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/knowknow-ai/id6748773796/reviews) |
| Number of ratings | **57K** | 2 |
| Positive reviews | 31.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | **#155** | — |
| Size | 210 MB | 104 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Philips](https://appshunter.io/developer/355645429) | [RETOWER TECH PTE. LTD.](https://appshunter.io/developer/1827325376) |

## What reviewers say

### Philips Sonicare

[App page](https://appshunter.io/ios/app/philips-sonicare/id1047099766)

**Currently charting:** #155 Top Free · Health & Fitness (US App Store)

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.

**Highlights:** Personalized brushing insights, Real-time guided brushing, SenseIQ technology adaptation, Mouth mapping and guidance, Brushing habit tracking, Automatic brush head reordering, Apple Health integration

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💎 Amazing toothbrush
- 👍 Cleans teeth very well
- 🚀 Toothbrush technology is great
- 🔍 App provides good brushing guidance
- 🔍 App tracks brushing habits

**What reviewers complain about**

- 🐛 App is buggy and crashes frequently
- 🐛 App has connectivity issues with toothbrush
- 🐛 App doesn't accurately track brushing
- 🔒 Privacy concerns with app data collection
- 💸 App is not worth the high cost of toothbrush

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/knowknow-ai/id6748773796)

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.

**Highlights:** AI-powered food analysis, Instant calorie and macro breakdown, Photo-based tracking, Nutrition insights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowKnow Plus | $9.99 | per month |
| KnowKnow Pro | $14.99 | per month |
| KnowKnow Plus Yearly | $113.99 | per year |
| KnowKnow Pro Yearly | $178.99 | per year |


## Frequently asked questions

### Is Philips Sonicare free?

Philips Sonicare is free to download, with no in-app purchases.

### Is KnowKnow AI free?

KnowKnow AI is free to download, with in-app purchases available.

### Which has better reviews, Philips Sonicare or KnowKnow AI?

Philips Sonicare is rated higher. Philips Sonicare averages 4.8 out of 5 from 57K ratings, while KnowKnow AI averages 3.0 from 2 ratings.

### Do Philips Sonicare or KnowKnow AI have ads?

Neither Philips Sonicare nor KnowKnow AI shows ads.

### Which is updated more often, Philips Sonicare or KnowKnow AI?

Philips Sonicare ships an update every 2 months, and KnowKnow AI every 3 weeks. Most recently, Philips Sonicare was updated on October 19, 2026 and KnowKnow AI on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*