# Dr Karl vs Speak Dhurga

The clearest difference is iOS requirement: Speak Dhurga at 12.0 against Dr Karl's 14.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Dr Karl | Speak Dhurga |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dr-karl/id1481435414/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 30.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | — |
| Monetization | Free | — |
| Size | 139 MB | 64 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Augmented Reality Services Pty. Ltd.](https://appshunter.io/developer/952688382) | [Thomas McLean](https://appshunter.io/developer/1755557615) |

## What reviewers say

### Dr Karl

[App page](https://appshunter.io/ios/app/dr-karl/id1481435414)

Explore science through augmented reality with interactive holographic content. Access bonus material, answer intriguing questions, and revisit content from previous books. Requires trigger images from the physical book to activate AR features.

**Highlights:** Augmented reality holograms, Interactive bonus content, Access to previous book content, Trigger image activation, Science trivia questions

**Features:** macOS Compatibility

**In-app purchases:** none


### Speak Dhurga

[App page](https://appshunter.io/ios/app/speak-dhurga/id6511234863)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dr Karl free?

Dr Karl is free to download, with no in-app purchases.

### Is Speak Dhurga free?

Speak Dhurga is free to download, with no in-app purchases.

### Do Dr Karl or Speak Dhurga have ads?

Neither Dr Karl nor Speak Dhurga shows ads.

---

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