# KnowKnow AI vs Scented Soul Diary

The clearest difference is update cadence: Scented Soul Diary at every 4 days against KnowKnow AI's every 3 weeks. On price, ads, in-app purchases 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 and Scented Soul Diary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

KnowKnow AI ships an update every 3 weeks, Scented Soul Diary every 4 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KnowKnow AI | Scented Soul Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/knowknow-ai/id6748773796/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 104 MB | 7 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [RETOWER TECH PTE. LTD.](https://appshunter.io/developer/1827325376) | [BY MILLY CO. LTD](https://appshunter.io/developer/6785222952) |

## What reviewers say

### 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 |


### Scented Soul Diary

[App page](https://appshunter.io/ios/app/scented-soul-diary/id6785222950)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | one-time |


## Frequently asked questions

### Is KnowKnow AI free?

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

### Is Scented Soul Diary free?

Scented Soul Diary is free to download, with in-app purchases available.

### Do KnowKnow AI or Scented Soul Diary have ads?

Neither KnowKnow AI nor Scented Soul Diary shows ads.

### Which is updated more often, KnowKnow AI or Scented Soul Diary?

KnowKnow AI ships an update every 3 weeks, and Scented Soul Diary every 4 days. Most recently, KnowKnow AI was updated on October 20, 2026 and Scented Soul Diary on October 25, 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.*