# App.in.den.OP® vs BVOU Reader

The clearest difference is update cadence: BVOU Reader at every 3 months against App.in.den.OP®'s every 17 months. BVOU Reader also leads on iOS requirement (13.0 vs 16.4). 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.

App.in.den.OP® ships an update every 17 months, BVOU Reader every 3 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | App.in.den.OP® | BVOU Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 months** |
| Size | 5 MB | 31 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [BDC Service GmbH](https://appshunter.io/developer/627452862) | [Berufsverband für Orthopädie und Unfallchirurgie e. V.](https://appshunter.io/developer/1350473470) |

## What reviewers say

### App.in.den.OP®

[App page](https://appshunter.io/ios/app/appindenop/id500191527)

**Features:** macOS Compatibility

**In-app purchases:** none


### BVOU Reader

[App page](https://appshunter.io/ios/app/bvou-reader/id6478606985)

**In-app purchases:** none


## Frequently asked questions

### Is App.in.den.OP® free?

App.in.den.OP® is free to download, with no in-app purchases.

### Is BVOU Reader free?

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

### Do App.in.den.OP® or BVOU Reader have ads?

Neither App.in.den.OP® nor BVOU Reader shows ads.

### Which is updated more often, App.in.den.OP® or BVOU Reader?

App.in.den.OP® ships an update every 17 months, and BVOU Reader every 3 months. Most recently, App.in.den.OP® was updated on October 3, 2026 and BVOU Reader on October 10, 2026.

---

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