# D vs doctorbook（ドクターブック）

The clearest difference is in-app purchases: doctorbook（ドクターブック） at none against D's 2. doctorbook（ドクターブック） also leads on update cadence (fortnightly vs every 7 months) and iOS requirement (15.1 vs 17.2). On price, ads and device support there is nothing between them.

Both are free to download. D sells 2 in-app purchases, starting at $11.99 per month. doctorbook（ドクターブック） asks for nothing beyond the download.

D ships an update every 7 months, doctorbook（ドクターブック） fortnightly. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | D | doctorbook（ドクターブック） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 8 MB | 40 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [BMTOYO](https://appshunter.io/developer/1679854208) | [Doctorbook](https://appshunter.io/developer/1504193261) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-camera/id6446960025)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $11.99 | per month |
| Basic Yearly | $129.99 | per year |


### doctorbook（ドクターブック）

[App page](https://appshunter.io/ios/app/doctorbook/id6749556014)

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

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is doctorbook（ドクターブック） free?

doctorbook（ドクターブック） is free to download, with no in-app purchases.

### Do D or doctorbook（ドクターブック） have ads?

Neither D nor doctorbook（ドクターブック） shows ads.

### Which is updated more often, D or doctorbook（ドクターブック）?

D ships an update every 7 months, and doctorbook（ドクターブック） fortnightly. Most recently, D was updated on October 8, 2026 and doctorbook（ドクターブック） on October 16, 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.*