# VHDL Compiler vs Simplex

The clearest difference is iOS requirement: VHDL Compiler at 12.0 against Simplex's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. VHDL Compiler sells 1 one-off in-app purchase and Simplex sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | VHDL Compiler | Simplex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (7 ratings)](https://appshunter.io/ios/app/vhdl-compiler/id1459379888/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 5 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ketan Appa](https://appshunter.io/developer/576435759) | [Fernando Castillo](https://appshunter.io/developer/1787896193) |

## What reviewers say

### VHDL Compiler

[App page](https://appshunter.io/ios/app/vhdl-compiler/id1459379888)

Write and test VHDL code on your mobile device. This application is designed for learning and executing VHDL snippets using the GHDL simulator. It offers a code editor with syntax highlighting and a custom keyboard for efficient input.

**Highlights:** Compile and run VHDL programs, View program output and errors, Custom keyboard for VHDL characters, Advanced source code editor, Syntax highlighting and line numbers, Import, open, save, and share files

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $2.99 | one-time |


### Simplex

[App page](https://appshunter.io/ios/app/simplex-linear-optimization/id6783993836)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simplex Premium | $1.99 | one-time |


## Frequently asked questions

### Is VHDL Compiler free?

VHDL Compiler is free to download, with in-app purchases available.

### Is Simplex free?

Simplex is free to download, with in-app purchases available.

### Do VHDL Compiler or Simplex have ads?

Both VHDL Compiler and Simplex show ads.

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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.*