# 6F vs Scent Diary

The clearest difference is ads: 6F at none against Scent Diary's shown. 6F also leads on update cadence (every 3 days vs every 8 months). Scent Diary's advantage is iOS requirement (15.0 vs 17). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 6F sells 2 in-app purchases, starting at $2.49 per month and Scent Diary sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

6F ships an update every 3 days, Scent Diary every 8 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | 6F | Scent Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (17 ratings)](https://appshunter.io/ios/app/6f-markup-annotate-and-draw/id1299469360/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 86.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 136 MB | 28 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [五四 徐](https://appshunter.io/developer/960344572) | [kota tada](https://appshunter.io/developer/1658942612) |

## What reviewers say

### 6F

[App page](https://appshunter.io/ios/app/6f-markup-annotate-and-draw/id1299469360)

This tool combines photo editing, annotation, and illustration capabilities into a single application. It offers precise markup and drawing features, similar to desktop software, using a virtual mouse for accuracy. Create professional designs, posters, and illustrations with ease.

**Highlights:** Accurate photo markup and annotation, Virtual mouse for precise control, Complex typesetting and poster design, Vector shape drawing and illustration, Create charts and graphics

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6F Master | $2.49 | per month |
| Upgrade to Pro | $2.99 | one-time |


### Scent Diary

[App page](https://appshunter.io/ios/app/scent-diary-scentmemory/id6747460278)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |
| Treat to Lunch | $14.99 | one-time |


## Frequently asked questions

### Is 6F free?

6F is free to download, with in-app purchases available.

### Is Scent Diary free?

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

### Do 6F or Scent Diary have ads?

Scent Diary shows ads; 6F does not.

### Which is updated more often, 6F or Scent Diary?

6F ships an update every 3 days, and Scent Diary every 8 months. Most recently, 6F was updated on October 24, 2026 and Scent Diary on October 24, 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.*