# DR vs Digital Electronics Pro

The clearest difference is price: DR at Free against Digital Electronics Pro's $4.99. Digital Electronics Pro's advantage is device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On update cadence, ads and in-app purchases there is nothing between them.

DR is free to download; Digital Electronics Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | DR | Digital Electronics Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 12 MB | 21 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Rutz Bildungsloesungen GmbH](https://appshunter.io/developer/708314115) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### DR

[App page](https://appshunter.io/ios/app/dr-annotate/id868029762)

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

**In-app purchases:** none


### Digital Electronics Pro

[App page](https://appshunter.io/ios/app/digital-electronics-pro/id6478407802)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DR free?

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

### Is Digital Electronics Pro free?

Digital Electronics Pro costs $4.99, with no in-app purchases.

### Do DR or Digital Electronics Pro have ads?

Neither DR nor Digital Electronics Pro shows ads.

### Which is updated more often, DR or Digital Electronics Pro?

DR ships an update every 2 months, and Digital Electronics Pro every 2 months. Most recently, DR was updated on November 1, 2026 and Digital Electronics Pro on November 6, 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.*