App Overview

Simple Sketchbook icon

Simple Sketchbook

Duncan Pollock · Graphics & Design

App Description

$1.99

PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
3 ratings · Top 30%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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Combine features and design from your favorite apps.

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What's included

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Simple Sketchbook: map the core Graphics & Design workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

App Description Simple Sketchbook is a distraction-free sketchbook for iPad, designed around the Apple Pencil but will also work with your finger. No subscription. No social features. Just a clean, fast place to draw. Create as many sketchbooks as you like, each with its own paper style — blank, lined, grid, dotted, or a range of specialty templates. Every sketchbook fills your screen edge to edge, and the canvas stays fixed in space when you rotate your iPad, so your drawing never moves out from under your hand. There is no zoom by design on iPad (iPhone users can double-tap to zoom), just a regular sketchbook page in digital space. Layers, done simply Each page supports multiple layers with individual opacity, blend mode, and visibility controls. Bring in photos from your library or drag and drop images directly onto the canvas to use as reference or compose with your work. Reposition, scale, and rotate images freely before committing them to the page. Export your work Export any page as a high-resolution PNG — with or without the background — or export an entire sketchbook as a PDF. Generate a timelapse video of your drawing process, perfect for sharing how a piece came together. Your sketchbooks, backed up Back up any sketchbook to a single file and restore it on any of your iPads. Backups scale automatically to fit the screen, so moving from an iPad mini to an iPad Pro keeps everything looking right. Lock individual sketchbooks with Face ID or Touch ID. Simple Sketchbook is a distraction-free drawing notebook for iPad and iPhone, built for the feel of putting pencil to paper, with just enough digital magic to make every page more useful than a physical one. Draw naturally A slim, always-out-of-the-way tool strip puts your pen, sizes, opacity and colours one tap away, no picker popovers, no hunting through menus. Double-tap or squeeze your Apple Pencil to switch tools instantly, or rest two fingers on the page to pull up the full tool grid without ever putting your pencil down. Layer it up Sketch, ink, and shade on separate layers. Drop in a photo and arrange it (move, scale, rotate) right on the canvas. Add a storyboard frame template for comic panels and animatics. Blend, reorder, and merge layers exactly like a design tool, but built for a sketchbook workflow. Paper that feels right Choose plain, lined, grid, dotted, or textured paper for every notebook, whatever the page is for, to structured notes. Watch your drawing come to life Every stroke is quietly recorded as you draw. Export a timelapse video of any page, or a whole run of pages, and watch a sketch build itself from first line to finished piece. Say what you're thinking Record a voice reflection on any page, your process, your intent, what you'd change next time, and Simple Sketchbook transcribes it on-device, completely privately. Reflections play back alongside your timelapse, or export as Markdown for a portfolio or journal. Yours, and only yours Lock any notebook with Face ID or Touch ID. Back up and restore your entire sketchbook library whenever you like. Nothing leaves your device unless you choose to share it. Whether you're a student building a visual journal, an artist studying your own process, or just someone who likes to draw — Simple Sketchbook gets out of your way and lets the page do the work.

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Offer a wider variety of brushes and settings.

Assumption to check: Limited brush customization options

Validate with people who use this workflow before building.

Hypothesis 2

Add functionality to export sketches in different formats.

Assumption to check: No export options for sketches

Validate with people who use this workflow before building.

Hypothesis 3

Implement a more visually appealing gallery with sorting options.

Assumption to check: Basic gallery layout

Validate with people who use this workflow before building.

Hypothesis 4

Introduce real-time collaboration for users to work together.

Assumption to check: Lacks collaboration features

Validate with people who use this workflow before building.

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

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BUILD KIT DIFFICULTY

Not assessed in a Build Kit yet.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.