VHDL Ref vs Language Reference for Xojo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VHDL Ref
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.
- 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
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The pocket translator for hardware description languages. VHDL Ref is a quick reference for VHDL, Verilog, and SystemVerilog, written by engineers for engineers. For every construct in VHDL it shows the equivalent in Verilog, and vice versa. Whether you are an FPGA or ASIC designer who thinks in one language but has to read the other, a verification engineer working in SystemVerilog, or an engineering student in your first digital design course, VHDL Ref puts the answer one tap away. + 328 entries covering every keyword, operator, and data type in both languages + Cross-language equivalents on every entry: see how the other language says it + A simple worked example for every single entry + SystemVerilog coverage, plus VHDL 2008 and Verilog 2001 notation + All pre-defined VHDL attributes + All Verilog primitive gates and drive strengths + Filter by language and by element type + Works completely offline: in the lab, on a plane, behind the firewall + No ads, no subscription, no account, no tracking Native on iPhone, iPad, and Mac (a real Mac app, not a port), so the same reference sits next to your simulator at your desk and rides in your pocket everywhere else. Note: VHDL Ref is a reference, not a simulator or compiler. It is the book you keep open beside your tools, rebuilt for the device you always have with you.
Language Reference for Xojo
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.
- Offline Xojo language documentation
- Accessible on iPhone and iPad
- No internet dependency
- Ideal for secondary screen use
- Updated for Xojo 2019r2.1
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Language Reference for Xojo is the full documentation for the the Xojo language now available on iPhone and iPad. This app brings the full language reference to the tip of your fingers with no dependencies to the Internet. You can now browse the Xojo language reference on a secondary screen leaving your desktop device fully available for development. Updated for Xojo 2019r2.1
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | VHDL Ref | Language Reference for Xojo |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.2 (5 ratings) | 4.8 (18 ratings) — better |
| Positive reviews | 44.4% of reviews | 87.5% of reviews — better |
| Number of ratings | 5 | 18 — better |
| Update frequency | Every 7 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | squishLogic | Jeremie Leroy |
Customer experience
VHDL Ref
Language Reference for Xojo
In-app purchases
VHDL Ref
No in-app purchases
Language Reference for Xojo
No in-app purchases



