# VHDL Ref vs Language Reference for Xojo

The clearest difference is price: Language Reference for Xojo at Free against VHDL Ref's $2.99. Language Reference for Xojo also leads on review sentiment (88% vs 44%) and rating (4.8 vs 3.2). On ads, in-app purchases and device support there is nothing between them.

Language Reference for Xojo is free to download; VHDL Ref costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Language Reference for Xojo holds the better App Store score, 4.8 against 3.2. Both are backed by a comparable volume of ratings — 5 and 18 respectively. Written reviews point the same way: 44% of VHDL Ref's written reviews are positive against 88% of Language Reference for Xojo's.

VHDL Ref ships an update every 7 months, Language Reference for Xojo every 3 months. The most recent releases landed on September 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | VHDL Ref | Language Reference for Xojo |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.2 (5 ratings)](https://appshunter.io/ios/app/vhdl-ref/id418473744/reviews) | **[4.8 (18 ratings)](https://appshunter.io/ios/app/language-reference-for-xojo/id1484982467/reviews)** |
| Number of ratings | 5 | **18** |
| Positive reviews | 44.4% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 46 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [squishLogic](https://appshunter.io/developer/353387502) | [Jeremie Leroy](https://appshunter.io/developer/1156304176) |

## What reviewers say

### VHDL Ref

[App page](https://appshunter.io/ios/app/vhdl-ref/id418473744)

This app serves as a quick reference for VHDL and Verilog, two popular Hardware Description Languages. It offers a searchable dictionary of keywords, operators, and data types, along with examples and common functions for each language. Designed for engineers and students, it facilitates cross-language comparison and filtering by language elements.

**Highlights:** Searchable dictionary of keywords, operators, and data types, Examples for every reference construct, Common functions for VHDL and Verilog, Pre-defined attributes for VHDL, Primitive gates and drive strengths for Verilog, Filter by language (VHDL, Verilog, or both), Filter by language elements

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

**In-app purchases:** none


### Language Reference for Xojo

[App page](https://appshunter.io/ios/app/language-reference-for-xojo/id1484982467)

Access comprehensive Xojo language documentation offline on your iPhone and iPad. This app provides instant access to the full language reference, ideal for developers who need quick lookups without an internet connection. Keep your primary development device free while you consult the documentation.

**Highlights:** Offline Xojo language documentation, Accessible on iPhone and iPad, No internet dependency, Ideal for secondary screen use, Updated for Xojo 2019r2.1

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VHDL Ref free?

VHDL Ref costs $2.99, with no in-app purchases.

### Is Language Reference for Xojo free?

Language Reference for Xojo is free to download, with no in-app purchases.

### Which has better reviews, VHDL Ref or Language Reference for Xojo?

Language Reference for Xojo is rated higher. VHDL Ref averages 3.2 out of 5 from 5 ratings, while Language Reference for Xojo averages 4.8 from 18 ratings.

### Do VHDL Ref or Language Reference for Xojo have ads?

Neither VHDL Ref nor Language Reference for Xojo shows ads.

### Which is updated more often, VHDL Ref or Language Reference for Xojo?

VHDL Ref ships an update every 7 months, and Language Reference for Xojo every 3 months. Most recently, VHDL Ref was updated on September 25, 2026 and Language Reference for Xojo on October 8, 2026.

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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.*