# DLR COMETS vs Brain Training with Numbers

The clearest difference is review sentiment: Brain Training with Numbers at 67% against DLR COMETS's 0%. DLR COMETS's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Brain Training with Numbers sells 1 one-off in-app purchase. DLR COMETS asks for nothing beyond the download.

DLR COMETS ships an update every 3 weeks, Brain Training with Numbers every 4 weeks. The most recent releases landed on September 8, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | DLR COMETS | Brain Training with Numbers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-training-with-numbers/id1516096715/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 416 MB | 12 MB |
| Requires iOS | **8.1** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DLR German Aerospace Center e.V.](https://appshunter.io/developer/418202933) | [宏斌 樊](https://appshunter.io/developer/1452129040) |

## 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


### Brain Training with Numbers

[App page](https://appshunter.io/ios/app/brain-training-with-numbers/id1516096715)

Enhance memory, attention, and logic with this brain game. Memorize number sequences quickly and recall them to train your short-term numerical memory. Suitable for all ages, it offers progressive challenges to boost cognitive skills.

**Highlights:** Memory sequence memorization, Attention and concentration training, Logic thinking enhancement, Multiple difficulty levels, Offline standalone play, Cognitive skill improvement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads. | $6.99 | one-time |


## Frequently asked questions

### Is DLR COMETS free?

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

### Is Brain Training with Numbers free?

Brain Training with Numbers is free to download, with in-app purchases available.

### Do DLR COMETS or Brain Training with Numbers have ads?

Brain Training with Numbers shows ads; DLR COMETS does not.

### Which is updated more often, DLR COMETS or Brain Training with Numbers?

DLR COMETS ships an update every 3 weeks, and Brain Training with Numbers every 4 weeks. Most recently, DLR COMETS was updated on September 8, 2026 and Brain Training with Numbers on June 5, 2026.

---

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