# III-V Comp.

> Calculates III-V compound semiconductor compositions and material properties. (iPhone/iPad app by Takuya Ishikawa.)

- Source: https://appshunter.io/ios/app/iii-v-comp/id475184953 (this page in markdown: same URL + `.md`)
- Developer: [Takuya Ishikawa](https://appshunter.io/developer/468311118)
- Category: Education, Reference
- Price: $2.99
- Rating: 4.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 10 MB
- Languages: Danish, Ukrainian, Russian, Croatian, Catalan, Hungarian, Norwegian Bokmål, Hindi, Indonesian, Turkish and 23 more
- Released: 2011-11-01
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/iii-v-comp/id475184953/reviews.md

## What is III?

Application to calculate the compositions and material properties of a III-V compound semiconductor.
Either InP or GaAs is assumed for the substrate.
Some of the compositions and material parameters of the AlGaInAsP compound semiconductor are specified to determine the remain unknown parameters.
The following properties are shown as a result: compositions (x, y, z), lattice constant, strain, bandgap, relative energy positions of the conduction and valence bands, and effective masses of the electron and holes.

## Key features

- III-V compound semiconductor calculations
- Material property determination
- Composition calculation (x, y, z)
- Lattice constant and strain analysis
- Bandgap and effective mass calculation
- Supports InP and GaAs substrates

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/iii-v-comp/id475184953/reviews.md

### 5/5 — IOS15 116

*2022-12-02*

This version mismatch IOS15/16,always crash when AlGaAs change to InAlGaAs

### 4/5 — Dr.

*2012-01-06*

Useful tool at finger tip when I have no access to an excel sheet. Adding more substrates including silicon will be helpful.

## Frequently asked questions about III

### What specific III-V compound semiconductors can III-V Comp. calculate properties for?

III-V Comp. is designed to calculate the compositions and material properties of AlGaInAsP compound semiconductors. It assumes either InP or GaAs as the substrate material for these calculations.

### What material properties does III-V Comp. display?

The application displays several key properties including compositions (x, y, z), lattice constant, strain, bandgap, relative energy positions of the conduction and valence bands, and effective masses of electrons and holes.

### What is the learning methodology of III-V Comp.?

III-V Comp. employs a direct calculation and visualization methodology. Users input known parameters for AlGaInAsP, and the app computes the remaining unknown properties based on established semiconductor physics principles.

### How does III-V Comp. track user progress?

As a calculation tool, III-V Comp. does not have a user progress tracking system. Its function is to provide immediate results for specific material property calculations based on user input.

### Does III-V Comp. offer certifications?

No, III-V Comp. does not offer any certifications. It is a utility application for calculating semiconductor material properties, not a course or educational program.

### What devices is III-V Comp. compatible with?

III-V Comp. is available for iPhone, iPad, and iPod touch devices. It requires iOS 4.0 or later.

### How often is III-V Comp. updated?

III-V Comp. was last updated on December 5, 2024, with version 3.3. The developer, Takuya Ishikawa, has a history of providing updates for this application.

### What is the price of III-V Comp.?

III-V Comp. is a paid application, available for $2.99. There are no in-app purchases or subscription fees associated with its use.

## Version history (last 5 releases)

### 3.3 — 2024-12-05

・Regular update.
・Adjusted to more machine resolutions with improved display.

### 3.2 — 2023-07-13

・Regular update.
・Adjusted to more machine resolutions with improved display.

### 3.1 — 2020-12-05

・Adjusted to iOS 14.
・Operates natively on more machines with improved display.

### 3.0 — 2020-04-05

Operates natively on more machines with improved display.
More than 100 languages can be used in the Application.
Therefore you may choose your native language.

### 2.2 — 2014-03-07

Fixed bugs.
Treats correctly the situation where several compositions can satisfy the given condition.
Resumes the parameters used in the previous calculation.

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All apps by Takuya Ishikawa: https://appshunter.io/developer/468311118

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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 2026-08-24.*