# Enzyme Defects — Metabolic Disorders

> Metabolic Disorders (iPhone/iPad app by Volker Egelhofer.)

- Source: https://appshunter.io/ios/app/enzyme-defects/id1346492407 (this page in markdown: same URL + `.md`)
- Developer: [Volker Egelhofer](https://appshunter.io/developer/1239857550)
- Category: Education
- Price: $3.99
- Age rating: 4+
- Requires: iOS 13.4 · 3 MB
- Languages: English, German
- Released: 2018-05-27
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/enzyme-defects/id1346492407/reviews.md

## What is Enzyme Defects?

• Learn and practice 50 important genetic metabolic disorders caused by enzyme defects.

• The app is divided into 4 sections: Introduction, Learning unit, Pairs Quiz, Test questions.

• In the introduction important terms are briefly explained.

• The learning unit contains detailed information on 50 genetic metabolic disorders. The information includes the name and EC number of the defect enzyme, a description of the underlying reaction type and the name of the metabolic pathway in which the enzyme is involved. Further information is the ICD-10 number, the disease frequency and a short description of the pathophysiology of the disease.

• The quiz allows you to learn related terms by turning over pairs of matching cards. 

• You may test your knowledge with the question unit.

• The target group of the app are students of biochemistry and medicine as well as scientifically interested high school students.



Features

• Learn ICD-10 codes and the pathophysiology of 50 important genetic metabolic disorders. 

• Learn the names, EC numbers, reaction types and metabolic pathways of the enzymes whose defects cause metabolic disorders.

• It is possible to learn the information about a metabolic disorder by uncovering individual learning cards step by step or all at once.

• In the introduction important terms such as ICD-10, enzymes, rare diseases, enzyme classifications, enzyme defects, heredity, and metabolic pathways are explained.

• The quiz is similar to matching pairs game, you can choose from 5 different pairs: Enzyme vs EC Number, Disease vs EC Number, Enzyme vs Disease, ICD-10 vs Disease and ICD-10 vs Enzyme.

• The number of cards can be set in steps of 2, from a minimum of 4 to a maximum of 14.

• The pairs are selected randomly.

• You may test your knowledge by answering randomly generated questions.

• The questions are automatically generated based on the complete content of the learning unit.

• No registration is required.

• No telemetry data are recorded!


## Version history (last 1 release)

### 1.2 — 2020-04-07

Thank you for your feedback! 

This update includes:
• Support for IOS 13
• Minor bugfixes 

If you have questions or suggestions for improvements, please write to: support@enzymedefects.dr-egelhofer.at.

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## More apps by Volker Egelhofer

- [BioScienceQuiz](https://appshunter.io/ios/app/biosciencequiz/id1239857551)
- [SciencePairs](https://appshunter.io/ios/app/sciencepairs/id1266737876)
- [Metabolic Pathways](https://appshunter.io/ios/app/metabolic-pathways/id1293290388)
- [NeuroReceptors](https://appshunter.io/ios/app/neuroreceptors/id1321912078)
- [Biochemistry One](https://appshunter.io/ios/app/biochemistry-one/id1365687112)

All apps by Volker Egelhofer: https://appshunter.io/developer/1239857550

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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 2026-05-19.*