# Dr Karl vs MVAC

The clearest difference is update cadence: MVAC at every 4 months against Dr Karl's every 18 months. 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.

Dr Karl ships an update every 18 months, MVAC every 4 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Dr Karl | MVAC |
| --- | --- | --- |
| 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 | **Every 4 months** |
| Monetization | Free | — |
| Size | 139 MB | 28 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Augmented Reality Services Pty. Ltd.](https://appshunter.io/developer/952688382) | [Manning Valley Anglican College Anglican Diocese of Newcastle](https://appshunter.io/developer/1491401119) |

## 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


### MVAC

[App page](https://appshunter.io/ios/app/mvac/id1491401120)

**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 MVAC free?

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

### Do Dr Karl or MVAC have ads?

Neither Dr Karl nor MVAC shows ads.

### Which is updated more often, Dr Karl or MVAC?

Dr Karl ships an update every 18 months, and MVAC every 4 months. Most recently, Dr Karl was updated on October 21, 2026 and MVAC 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.*