Comparison

Processing & p5.js iCompiler vs RubySketch

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

Head to head
About

Processing & p5.js iCompiler

Develop and compile Processing and p5.js code directly on your mobile device. Export your creations as standalone apps for offline use. Ideal for students and educators learning creative coding.

Highlights
  • Compose and compile code on mobile
  • Export projects as home screen apps
  • Offline app usage
  • Code highlighting and formatting
  • 3D sketches and games support
  • Error highlighting (Pro feature)
Features
Read full description

Compose and compile your Processing & p5.js projects right on your phone or iPad, wherever your are! Export your Processing projects as App on your home screen: 1. Select an App icon for your Processing project. 2. Add it to your home screen. You can now use the app offline, just like any other app! This app is already being used in high schools and universities to teach and learn Processing & p5.js. Your code is highlighted and formatted for excellent reading-comfort. Processing Pro allows you to see which parts of your code are causing problems. 3D sketches and games are supported. This is not an official app by processing.org or p5.js Available subscription: Processing Pro, offers additional functionalities, such as exporting your sketches as apps. Trailer Music: Circle of Alchemists Privacy and Terms: http://processing-app.org/terms/

About

RubySketch

This app provides a Ruby interpreter and text editor, allowing users to write and run Ruby scripts. It also features a graphics API compatible with Processing for creative coding on mobile devices.

Highlights
  • Built-in Ruby interpreter (CRuby/MRI)
  • Processing-compatible graphics API
  • Text editor with easy cursor movement
  • Physics-capable sprites
  • Image input from camera
  • Sound playback
  • Sample scripts and games
Features
Read full description

This app includes Ruby language interpreter known as CRuby or MRI (Matz Ruby Implementation) and a simple text editor. So you can edit and run a ruby script. It also has an API that is almost compatible with Processing that is well known as a Creative Coding framework. So you can enjoy graphics programming on your iPhone or iPad. Key Features - Built-in Ruby interpreter (CRuby / MRI) - Processing-compatible graphics API with shaders available - Built-in text editor that makes moving the cursor painless - Physics-capable sprites - Image input from camera - Sound playback - Includes many sample scripts, including simple games This is a list of functions implemented to be compatible with the Processing API. --- abs, acos, alpha, angleMode, applyMatrix, arc, asin, atan, atan2, background, beginContour, beginShape, bezier, bezierDetail, bezierPoint, bezierTangent, bezierVertex, blend, blendMode, blue, brightness, ceil, circle, clear, clip, color, colorMode, constrain, copy, cos, createCanvas, createCapture, createFont, createGraphics, createImage, createShader, createShape, createVector, curve, curveDetail, curvePoint, curveTangent, curveTightness, curveVertex, degrees, deltaTime, displayDensity, displayHeight, displayWidth, dist, doubleClicked, draw, ellipse, ellipseMode, endContour, endShape, exp, fill, filter, floor, focused, frameCount, frameRate, fullScreen, fullscreen, green, height, hue, image, imageMode, key, keyCode, keyIsDown, keyIsPressed, keyPressed, keyReleased, keyTyped, lerp, lerpColor, line, loadFont, loadImage, loadPixels, loadShader, log, loop, mag, map, max, min, motion, motionGravity, mouseButton, mouseClicked, mouseDragged, mouseMoved, mousePressed, mouseReleased, mouseWheel, mouseX, mouseY, noClip, noFill, noLoop, noSmooth, noStroke, noTint, noise, noiseDetail, noiseSeed, norm, pixelDensity, pixelHeight, pixelWidth, pixels, pmouseX, pmouseY, point, pop, popMatrix, popStyle, pow, printMatrix, push, pushMatrix, pushStyle, quad, quadraticVertex, radians, random, randomGaussian, randomSeed, rect, rectMode, red, redraw, renderMode, requestImage, resetMatrix, resetShader, rotate, rotateX, rotateY, rotateZ, round, saturation, save, scale, setTitle, setup, shader, shape, shapeMode, shearX, shearY, sin, size, smooth, sq, sqrt, square, stroke, strokeCap, strokeJoin, strokeWeight, tan, text, textAlign, textAscent, textDescent, textFont, textLeading, textSize, textWidth, texture, textureMode, textureWrap, tint, touchEnded, touchMoved, touchStarted, touches, translate, triangle, updatePixels, vertex, width, windowHeight, windowMove, windowMoved, windowOrientation, windowResizable, windowResize, windowResized, windowWidth, windowX, windowY

Screenshots

Processing & p5.js iCompiler4 screens
RubySketch2 screens

Verdict

The call

The clearest difference is rating: RubySketch at 4.7 against Processing & p5.js iCompiler's 3.5. RubySketch also leads on review sentiment (100% vs 58%). Processing & p5.js iCompiler's advantage is ads (none vs shown) and chart position (#111 vs unranked). On price, update cadence, in-app purchases and monetization model 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

Both are free to download. Processing & p5.js iCompiler sells 5 in-app purchases, starting at $3.49 per month and RubySketch sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

RubySketch holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 80 and 24 respectively. Written reviews point the same way: 58% of Processing & p5.js iCompiler's written reviews are positive against 100% of RubySketch's.

UpkeepUpdate frequency

Processing & p5.js iCompiler ships an update every 2 months, RubySketch every 5 weeks. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 6 level
Processing & p5.js iCompiler versus RubySketch: the parameters behind the verdict, then further details
ParameterProcessing & p5.js iCompilerRubySketch
PriceFreeFree
Rating3.5 (80 ratings)4.7 (24 ratings) — better
Positive reviews58.0% of reviews100.0% of reviews — better
Number of ratings80 — better24
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#111 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size10 MB82 MB
Age rating4+4+
Developerriedel.wtf apps S.L.Noritaka Suzuki

Customer experience

Processing & p5.js iCompiler

All ratings80 ratings
Positive58.8%
Neutral8.8%
Negative32.5%
Written reviews162 reviews
Positive58.0%
Neutral12.3%
Negative29.6%

RubySketch

All ratings24 ratings
Positive95.8%
Neutral0.0%
Negative4.2%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Processing & p5.js iCompiler

Reported bugs

20 issues
  • Code reverts to earlier versions after app sleep
  • Changes lost when phone falls asleep
  • Functions with parameters cause black screen
  • StringList data type not recognized
  • Boolean highlighting shows 'bool' instead of full word
Show 15 more
  • Else statements break code formatting
  • Try/catch blocks don't work properly
  • Cursor position jumps unexpectedly while typing
  • Screen scrolls to bottom when typing mid-file
  • Swipe-to-go-back gesture interferes with drawing
  • mouseClicked() event fires multiple times per click
  • Import folder feature doesn't work
  • Cannot use numbers/underscores in project names
  • blendMode() and other complex functions fail
  • Silent failures with blank screen output
  • Inconsistent error highlighting
  • Typing lag with large projects (700+ lines)
  • Example project code disappeared after updates
  • Dialog boxes appear in German
  • About and new project buttons invisible in light mode

Requested features

20 requests
  • Free basic error messages for all users
  • Undo/redo functionality
  • Project renaming capability
  • Project duplication feature
  • Robust auto-save and backup system
Show 15 more
  • GIF animation support for sprites
  • Library import and management system
  • Landscape mode support
  • Find and replace functionality
  • Console output for debugging
  • Settings/preferences menu
  • File organization with folders
  • Project thumbnails
  • Built-in documentation/reference
  • Processing to p5.js conversion tool
  • Ability to import entire project folders
  • Font size customization
  • Fullscreen mode for screenshots
  • PVector class support
  • Pixel density optimization for Retina displays

RubySketch

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Processing & p5.js iCompiler

Subscriptions2
  • Processing Pro (Monthly)$3.491 Month
  • Processing Pro (Annual)$9.991 Year
One-time3
  • Processing for iOS Tip$4.99
  • Processing Pro Lifetime Unlock$25.99
  • Processing for iOS Tip$99.99
1 purchases

RubySketch

One-time1
  • Remove Ads$9.99

Questions

Is Processing & p5.js iCompiler free?
Processing & p5.js iCompiler is free to download, with in-app purchases available.
Is RubySketch free?
RubySketch is free to download, with in-app purchases available.
Which has better reviews, Processing & p5.js iCompiler or RubySketch?
RubySketch is rated higher. Processing & p5.js iCompiler averages 3.5 out of 5 from 80 ratings, while RubySketch averages 4.7 from 24 ratings.
Do Processing & p5.js iCompiler or RubySketch have ads?
RubySketch shows ads; Processing & p5.js iCompiler does not.
Which is updated more often, Processing & p5.js iCompiler or RubySketch?
Processing & p5.js iCompiler ships an update every 2 months, and RubySketch every 5 weeks. Most recently, Processing & p5.js iCompiler was updated on October 16, 2026 and RubySketch on October 8, 2026.

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