Comparison

Three Pigs Cantonese vs DEC Opcodes

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Three Pigs Cantonese

Features
Read 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.

About

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.

Highlights
  • Instruction set reference
  • Historical context and photos
  • System specifications
  • Interactive assembly lessons
  • Search and filtering
  • Customizable themes
  • Simple assembler
Features
Read 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

Three Pigs Cantonese4 screens
DEC Opcodes4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 6 level
Three Pigs Cantonese versus DEC Opcodes: the parameters behind the verdict, then further details
ParameterThree Pigs CantoneseDEC Opcodes
Price$0.99Free — better
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 3 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.218.0 — better
Further details — not scored
Size1.2 GB42 MB
Age rating4+4+
DeveloperJeffrey DickJohn Kennedy

In-app purchases

None

Three Pigs Cantonese

No in-app purchases

1 purchases

DEC Opcodes

One-time1
  • Buy Me a Coffee$0.99

Questions

Is Three Pigs Cantonese free?
Three Pigs Cantonese costs $0.99, with no in-app purchases.
Is DEC Opcodes free?
DEC Opcodes is free to download, with in-app purchases available.
Do Three Pigs Cantonese or DEC Opcodes have ads?
Neither Three Pigs Cantonese nor DEC Opcodes shows ads.
Which is updated more often, Three Pigs Cantonese or DEC Opcodes?
Three Pigs Cantonese ships an update every 3 months, and DEC Opcodes every 8 days. Most recently, Three Pigs Cantonese was updated on October 3, 2026 and DEC Opcodes on October 7, 2026.

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