Comparison

perli$ 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

perli$

Learn, run, and share Perl 5.22 scripts on iOS. Features include autocompletion, code coloring, a built-in browser for learning materials, and file system support for various document types. Customize your learning environment with background options and animations.

Highlights
  • Learn, run, and share Perl 5.22 scripts
  • Autocompletion and auto-indentation
  • Code coloring and templates
  • Built-in browser for learning materials
  • File system support for various document types
  • Customizable learning environment
  • Generate and share QR codes for scripts
Features
Read full description

This is an ios perl 5.22 app,you can learn,run,share perl 5.22 script. Features : Autocomplate. Auto Indent. Code color. In(the built-in browser or the txt editor),Select the text to run. Horizontal screen development. Code templates,the contents of the new file is copy from contents of the template file. *You can enter perl code, and then you can execut the perl code,support the STDIN function. *You can use the file system to supports txt, pdf, chm, mp3,m4v,zip, gif, png, html, pl ,doc... *You can find learning materials by the built-in browser . *You can save perl code and learning materials, and can be modified to the save file and delete the save file . *You can control the background image and color, and execution voice , background animation, text color and shadow, switch interface animation , the number and the order of the main interface of the tab bar to create your learning software. *You can Learn perl knowledge , the system provides some basic learning materials . *You can use perl code or learning materials to generate two-dimensional code , for easy sharing . *You can share code by Email,Weibo,Twitter,Facebook. *You can use the counter,light in the Setting tab.

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

perli$4 screens
DEC Opcodes4 screens

Verdict

The call

The clearest difference is price: DEC Opcodes at Free against perli$'s $2.99. DEC Opcodes also leads on update cadence (every 8 days vs every 19 months). perli$'s advantage is in-app purchases (none vs 1) and device support (4 vs 2). On rating, ratings volume and ads 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; perli$ costs $2.99 up front. DEC Opcodes sells 1 one-off in-app purchase. perli$ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for perli$ against 5.0 for DEC Opcodes. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

UpkeepUpdate frequency

perli$ ships an update every 19 months, DEC Opcodes every 8 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 4 level
perli$ versus DEC Opcodes: the parameters behind the verdict, then further details
Parameterperli$DEC Opcodes
Price$2.99Free — better
Rating5.0 (3 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews—
Number of ratings33
Update frequencyEvery 19 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS14.0 — better18.0
Further details — not scored
Size78 MB42 MB
Age rating17+4+
Developer小文 黄John Kennedy

Customer experience

perli$

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DEC Opcodes

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

perli$

No in-app purchases

1 purchases

DEC Opcodes

One-time1
  • Buy Me a Coffee$0.99

Questions

Is perli$ free?
perli$ costs $2.99, with no in-app purchases.
Is DEC Opcodes free?
DEC Opcodes is free to download, with in-app purchases available.
Which has better reviews, perli$ or DEC Opcodes?
perli$ and DEC Opcodes are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.
Do perli$ or DEC Opcodes have ads?
Neither perli$ nor DEC Opcodes shows ads.
Which is updated more often, perli$ or DEC Opcodes?
perli$ ships an update every 19 months, and DEC Opcodes every 8 days. Most recently, perli$ was updated on October 24, 2026 and DEC Opcodes on October 7, 2026.

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