RubySketch vs Rubyist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Rubyist
Execute and automate Ruby scripts directly on your iPhone and iPad. This app utilizes the MRuby VM to run code, integrate with Shortcuts and Siri, and offers a robust editor with syntax highlighting and autocomplete.
- Run Ruby code on device
- Editor with syntax highlighting
- Code autocomplete
- Shortcuts app integration
- Siri command creation
- Native alerts and inputs
- HTTP requests
- Clipboard access
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Rubyist allows you to run Ruby code on your iPhone and iPad using the MRuby VM. Run code directly in the app or via the Shortcuts app or Siri commands. Features: - Run Ruby code directly on your device - Built-in documentation viewer - Editor with ruby syntax highlighting - Code Autocomplete - Run Ruby directly in Shortcuts - Build your own Siri commands in Ruby. - Display native alerts and inputs using exclusive APIs - Make http requests from your code. - Write and read your clipboard from code
Screenshots
Verdict
The clearest difference is ads: Rubyist at none against RubySketch's shown. Rubyist also leads on ratings volume (93 vs 24). RubySketch's advantage is review sentiment (100% vs 83%). On price, rating, update cadence and in-app purchases 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
Both are free to download. RubySketch sells 1 one-off in-app purchase and Rubyist sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for RubySketch against 4.6 for Rubyist. Both are backed by a comparable volume of ratings — 24 and 93 respectively. Written reviews are what separate them: 100% of RubySketch's written reviews are positive against 83% of Rubyist's.
RubySketch ships an update every 5 weeks, Rubyist every 3 weeks. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.
| Parameter | RubySketch | Rubyist |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (24 ratings) — better | 4.6 (93 ratings) |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 24 | 93 — better |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 82 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Noritaka Suzuki | TSUBASA TECHNOLOGIES LIMITED LIABILITY COMPANY |
Customer experience
RubySketch
Rubyist
In-app purchases
RubySketch
- Remove Ads$9.99
Rubyist
- Small Tip$0.99
- Medium Tip$4.99
- Large Tip$9.99








