# DLR COMETS vs HdBA App

The clearest difference is review sentiment: HdBA App at 20% against DLR COMETS's 0%. DLR COMETS's advantage is monetization model (free vs ad-supported) and iOS requirement (8.1 vs 16.4). On price, update cadence, ads and in-app purchases there is nothing between them.

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

DLR COMETS ships an update every 3 weeks, HdBA App fortnightly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | DLR COMETS | HdBA App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **20.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 416 MB | 110 MB |
| Requires iOS | **8.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DLR German Aerospace Center e.V.](https://appshunter.io/developer/418202933) | [UniNow GmbH](https://appshunter.io/developer/1099302123) |

## What reviewers say

### DLR COMETS

[App page](https://appshunter.io/ios/app/dlr-comets/id1363156480)

Explore the Rosetta mission to Comet 67P/Churyumov-Gerasimenko through an interactive exhibition. Discover the science behind comets and the historic Philae lander touchdown. Relive this exceptional spaceflight adventure with multimedia content.

**Highlights:** Interactive comet model, Mission highlights and photographs, Historical background on comets, Rosetta mission science, Philae lander touchdown details, Personal stories from the mission

**Features:** macOS Compatibility

**In-app purchases:** none


### HdBA App

[App page](https://appshunter.io/ios/app/hdba-app/id1611531303)

This app supports students with daily university life, offering tools for managing schedules, tracking grades, and accessing learning materials. It provides quick access to library resources and canteen menus, streamlining campus activities.

**Highlights:** Timetable management, Grade point average calculation, Push notifications for new grades, Access to e-learning materials (ILIAS), Library access, Canteen menu information

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is DLR COMETS free?

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

### Is HdBA App free?

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

### Do DLR COMETS or HdBA App have ads?

Neither DLR COMETS nor HdBA App shows ads.

### Which is updated more often, DLR COMETS or HdBA App?

DLR COMETS ships an update every 3 weeks, and HdBA App fortnightly. Most recently, DLR COMETS was updated on October 10, 2026 and HdBA App on October 13, 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.*