Three Pigs Cantonese vs DEC Opcodes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Three Pigs Cantonese
Read full descriptionHide full description
Build your Cantonese skills with the classic story of The Three Little Pigs (三隻小豬)! This app provides a side-by-side bilingual reading experience with Cantonese (Traditional Chinese) and English translations, designed to help language learners acquire common vocabulary and understand essential Cantonese grammar in a familiar context. Follow the three brothers as they build their houses and face the big bad wolf, all while practicing your reading and listening skills. Perfect for learners of all levels, this reader uses repetitive structures and includes Jyutping support, making it ideal for internalizing Cantonese verbs and sentence patterns.
DEC Opcodes
Explore the instruction sets of legendary DEC computers like the PDP and VAX. This app provides detailed information on each instruction, historical context, and interactive lessons. Discover the machines that shaped modern computing.
- Instruction set reference
- Historical context and photos
- System specifications
- Interactive assembly lessons
- Search and filtering
- Customizable themes
- Simple assembler
Read full descriptionHide full description
Dec Opcodes – DEC Architecture Reference Before the microprocessor, there was DEC. The minicomputers built by Digital Equipment Corporation didn't just advance computing - they defined it. Unix was born on a PDP-7. Spacewar! ran on a PDP-1. The field of Artificial Intelligence was born on the PDP-10. The VAX powered universities and research labs worldwide for a generation. DecOpcodes puts the complete instruction sets of these legendary machines in your pocket. Five iconic architectures covered: PDP-1 (1960) · PDP-8 (1965) · PDP-10 (1966) · PDP-11 (1970) · VAX (1977) For every instruction: • Full description of what the instruction does • Octal and hex encoding • Flags affected • Addressing modes, word count, and cycle counts • Assembly code examples and implementation notes But there is a lot more than just dry opcodes: • Complete system specifications and register architecture • Historical context and cultural impact • Archival photographs - front panels, system cabinets, and more • Notable installations and the systems they powered • Architecture variants and successors • Interactive lessons on assembly language and console operations (ideal if you have an PiDP emulator) Built for exploration: • Search across all systems instantly • A simple assembler for PDP-1, -8 and -11 code • Filter by instruction category • Sort alphabetically or by category • Favorite instructions for quick reference Beautifully designed: • System-specific accent colours • Five themes including Terminal green and Blinkenlights orange • Full Dark Mode support From the 18-bit simplicity of the PDP-1 to the 32-bit sophistication of the VAX, DecOpcodes is a fascinating and interactive journey through the machines that made modern computing possible. All features are free and unlocked. If you like the app you can always leave a nice review or tip the developer!
Screenshots
Verdict
The clearest difference is price: DEC Opcodes at Free against Three Pigs Cantonese's $0.99. DEC Opcodes also leads on update cadence (every 8 days vs every 3 months). Three Pigs Cantonese's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
DEC Opcodes is free to download; Three Pigs Cantonese costs $0.99 up front. DEC Opcodes sells 1 one-off in-app purchase. Three Pigs Cantonese asks for nothing beyond the download.
Three Pigs Cantonese ships an update every 3 months, DEC Opcodes every 8 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.
| Parameter | Three Pigs Cantonese | DEC Opcodes |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 3 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.2 | 18.0 — better |
| Further details — not scored | ||
| Size | 1.2 GB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeffrey Dick | John Kennedy |
In-app purchases
Three Pigs Cantonese
No in-app purchases
DEC Opcodes
- Buy Me a Coffee$0.99
Questions
Is Three Pigs Cantonese free?
Is DEC Opcodes free?
Do Three Pigs Cantonese or DEC Opcodes have ads?
Which is updated more often, Three Pigs Cantonese or DEC Opcodes?
Other comparisons















