# III-V Calc — A III-V properties calculator

> A III-V properties calculator (iPhone/iPad app by Scott P. Ahrenkiel.)

- Source: https://appshunter.io/ios/app/iii-v-calc/id6773777307 (this page in markdown: same URL + `.md`)
- Developer: [Scott P. Ahrenkiel](https://appshunter.io/developer/6773777309)
- Category: Utilities, Education
- Price: $3.99 (on sale, was $7.99)
- Age rating: 4+
- Requires: iOS 16.2 · 50 MB
- Languages: American English
- Released: 2026-06-22
- Data updated: 2026-10-28

## What is III?

III-V Calc is designed for the workflow of epitaxial heterostructure design, so you can easily navigate the composition, bandgap, and lattice constant of III-V semiconductor alloys. Find the bandgap and lattice constant from the composition — or — find the composition that has the right bandgap and lattice mismatch. Create a graded composition profile with a few taps. Sweep through the compositional space to explore alternatives and limitations. Visualize relationships between properties and composition. Save your calculated layer parameters. Customize display and precision options.

## Is III safe?

Not enough ratings yet to assess III.

## Is III legit?

III-V Calc has limited verification signals. The AppsHunter Legitimacy Score for III is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.0.2 — 2026-10-27

Updated keywords and app preview format.

### 2.0.1 — 2026-10-21

• Fix typo.
• Update keywords.

### 2.0 — 2026-10-16

• Align text-field content.
• Allow long-tap-drag reordering of Calculate and Properties sections.
• Enable lock button in Properties set table cells.
• Deactivate restricted solution on next action.
• Restore Properties sets on relaunch.
• Polynomial direct/indirect transition boundary replaces triangulated model.
• Generalized plotting utility added.
• Iso-contours displayed for current parameters.
• Indirect-bandgap regions indicated in Plotter.
• Synchronized Solver/Plotter targets.
• Si/Ge substrates allowed.
• Add focus mode

### 1.1 — 2026-06-27

• Align text-field content.
• Allow long-tap-drag reordering of Calculate and Properties sections.
• Enable lock button in Properties set table cells.
• Deactivate restricted solution on next action.
• Restore Properties sets on relaunch.

### 1.0 — 2026-06-22

No release notes.

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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 2026-10-28.*