# Green 911 for LEGO 10242 Set — Building Instructions

> Building instructions to convert LEGO 10242 Mini Cooper to a green Porsche. (iPhone/iPad app by Sergey Slobodenyuk.)

- Source: https://appshunter.io/ios/app/green-911-for-lego-10242-set/id1112307499 (this page in markdown: same URL + `.md`)
- Developer: [Sergey Slobodenyuk](https://appshunter.io/developer/887715963)
- Category: Entertainment, Games, Racing
- Price: Free with in-app purchases
- Rating: 4.60/5 from 9 App Store ratings · 31 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 38 MB
- Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 21 more
- Released: 2016-05-25
- Data updated: 2026-06-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/green-911-for-lego-10242-set/id1112307499/reviews.md

## What is Green 911 for LEGO 10242 Set?

Transform LEGO Mini Cooper 10242 into cool green Porsche cabriolet using our building instructions. The model features opening doors, trunk and hood.

Our instructions are clear and easy to follow – almost like the real instructions from the box. They have large step-by-step pictures, a LEGO parts list and "highlight new parts" button.

We hope you enjoy making this MOC (My Own Creation). Please leave a short review or share your comments on the AppStore. This will help us upload MOCs more frequently and make them better.

Thanks!

NOTES: 
- The app, model and building steps are created by fans of LEGO and are not an official LEGO product. 
- LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this application.
- This free version is supported by ads. You can remove advertisements by In-App purchases.

## Key features

- Convert LEGO Mini Cooper 10242
- Green Porsche cabriolet model
- Clear step-by-step instructions
- Large pictures
- LEGO parts list
- Highlight new parts button

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Version | $9.99 | one-time |


## Recent user reviews (10 of 31)

All indexed reviews: https://appshunter.io/ios/app/green-911-for-lego-10242-set/id1112307499/reviews.md

### 4/5 — Nach mehreren Updates und Handywechsel ein zweites Mal zur Zahlung der Vollversion aufgefordert

*2020-10-27, version 1.4*

Ich habe vorletztes Jahr die Vollversion gekauft und zu Weihnachten das entsprechende Legoset mit dem Mini geschenkt bekommen. 
Mangels Zeit wollte ich jetzt erst den Zusammenbau angehen. Habe inzwischen ein neues Handy und die Vollversion ist nicht mehr verfügbar.  Support angeschrieben, keine Antwort. 
Sehr ärgerlich! Am besten die Finger davon lassen.

### 1/5 — Funktioniert nicht!

*2020-10-18, version 1.3*

Beim kauf der vollversion kam nur eine in-app product error meldung. Nach öfterem installieren und deinstallieren und nochmal kaufen, immer noch keine funktion.
10,99€ für den ar***.

### 4/5 — Reasonable

*2020-06-06, version 1.3*

BEWARE you need every spare part the set comes with (in my case even that was not quite enough) and a steering wheel and white dot brick that are not in the set. Also the brick counts in the app are WRONG do not rely on them to replace bits as I did while building 

At a point close to the end of the build I feared I would not be able to complete it which would have been soul destroying. I had a shortage of green 1x1 plates even after using every spare. However leaving a few off here and there and moving some around allowed me to finish it and it is not as fragile as I feared (tip here is to use the spare 8x4 plate to reinforce the rear floor)

Looks the business. Great design. You should be upfront on the spares and extra bricks required.

### 1/5 — Dommage

*2020-03-21, version 1.3*

Dommage que ce soit payant (10€)

### 3/5 — Why do you have to buy?

*2019-02-04*

You’ve already bought the set, so why now do you need to buy these instructions?
Would give 5 stars if it was all free 😕

### 2/5 — Nervenkitzel

*2019-01-22, version 1.2*

Das Modell sieht, wenn man es denn mal hinbekommt es zu bauen, echt toll aus. 
Allerdings ist es eine Katastrophe zum zusammenbauen..

### 5/5 — Dream come true

*2019-01-19, version 1.2*

Absolutely fascinating that this really works. A good looking 911 is a dream come true and it’s mindblowing to see how this transformation from the Mini was realized. Yes, the build is often quirky and the model is less than stable. Still it‘s highly recommended for any Lego and Porsche enthusiast.

### 5/5 — Awesome!

*2018-12-27, version 1.2*

I see other comments complaining about the price, but it seems reasonable for something someone worked so hard to design! My one complaint would be that the hood is a little too angular. However, I understand the limits of working with the parts available!

### 5/5 — Question

*2018-09-06, version 1.2*

Je n’arrive pas à trouver un volant qui pourrait fonctionné, celui d’origine marche il ? 
La Porsche est environ de la même taille que la mini

### 2/5 — Requires additional pieces

*2018-02-12*

I appreciate the ingenuity in designing this model using an existing set. That said, this design requires at least 15 additional pieces plus removing stickers in order to complete it. Fortunately, if you have more than a few larger Lego sets, you will probably have enough of the extra pieces Lego includes to cover 99% of the additional missing pieces.

## Frequently asked questions about Green 911 for LEGO 10242 Set

### What does this app do?

This app provides building instructions to transform the official LEGO Mini Cooper 10242 set into a custom green Porsche cabriolet model. It includes large, step-by-step pictures and a parts list to guide you through the modification.

### What are the key features of these instructions?

The instructions offer clear, step-by-step guidance with large visuals, a complete LEGO parts list, and a helpful 'highlight new parts' button. The resulting model features opening doors, trunk, and hood.

### Is this app free to use?

Yes, the app is free to download and use, supported by advertisements. You have the option to remove these ads through an in-app purchase.

### What LEGO set is required for these instructions?

You will need the official LEGO Mini Cooper 10242 set to follow these building instructions and create the custom green Porsche cabriolet.

### Is this an official LEGO product?

No, this app and the building instructions are created by fans of LEGO and are not an official product of the LEGO Group. The LEGO Group does not sponsor, authorize, or endorse this application.

## Version history (last 4 releases)

### 1.4 — 2020-10-20

Fixed issue with in-app purchases on iOS 14

### 1.3 — 2019-04-16

- Improved building process
- Removed ads
- Changed app name

### 1.2 — 2016-10-10

Added checking for in-app updates

### 1.0 — 2016-05-25

No release notes.

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## More apps by Sergey Slobodenyuk

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All apps by Sergey Slobodenyuk: https://appshunter.io/developer/887715963

## Related topics

[lego sets building](https://appshunter.io/ios/topics/lego-sets-building) · [sergey slobodenyuk](https://appshunter.io/ios/topics/sergey-slobodenyuk)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*