# DLR COMETS vs Master Math Island

The clearest difference is review sentiment: Master Math Island at 50% against DLR COMETS's 0%. DLR COMETS's advantage is in-app purchases (none vs 10) and update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Master Math Island sells 7 one-off in-app purchases. DLR COMETS asks for nothing beyond the download.

DLR COMETS ships an update every 3 weeks, Master Math Island every 4 months. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | DLR COMETS | Master Math Island |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/master-math-island/id6449206772/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 416 MB | 498 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DLR German Aerospace Center e.V.](https://appshunter.io/developer/418202933) | [Blake eLearning](https://appshunter.io/developer/530378341) |

## 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


### Master Math Island

[App page](https://appshunter.io/ios/app/master-math-island/id6449206772)

This app offers a fun and engaging way to learn and practice math for ages 7-70. Through hundreds of motivating games, users can conquer number facts, build confidence, and earn in-game rewards while developing their math skills in an immersive world.

**Highlights:** Step-by-step math learning sequence, Hundreds of motivating math games, In-game rewards and progress tracking, World building and island customization, Practice basic math facts, Enhance recall, speed, and accuracy

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Bundle | $2.99 | one-time |
| Big Bundle | $5.99 | one-time |
| Modest Bundle | $7.99 | one-time |
| Big Bundle | $9.99 | one-time |
| Big Bundle | $12.99 | one-time |
| Big Bundle | $14.99 | one-time |
| Complete Bundle | $19.99 | one-time |


## Frequently asked questions

### Is DLR COMETS free?

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

### Is Master Math Island free?

Master Math Island is free to download, with in-app purchases available.

### Do DLR COMETS or Master Math Island have ads?

Neither DLR COMETS nor Master Math Island shows ads.

### Which is updated more often, DLR COMETS or Master Math Island?

DLR COMETS ships an update every 3 weeks, and Master Math Island every 4 months. Most recently, DLR COMETS was updated on October 10, 2026 and Master Math Island on October 5, 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.*