App Overview

GridMaker icon

GridMaker

NNN Software · Education

Create accurate grids in inches or metric to print or share as PNG, PDF or SVG

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.3
39 ratings · Below Average

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

Make this idea yours

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 included20 files

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 GridMaker: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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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 more color palettes and grid styles.

Assumption to check: Limited grid customization options

Validate with people who use this workflow before building.

Hypothesis 2

Simplify navigation and add tooltips.

Assumption to check: User interface can be confusing

Validate with people who use this workflow before building.

Hypothesis 3

Optimize rendering for larger grid sizes.

Assumption to check: Performance issues with large grids

Validate with people who use this workflow before building.

Hypothesis 4

Add functionality for users to share and rate grids.

Assumption to check: Lack of community sharing features

Validate with people who use this workflow before building.

App evidence

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

App Store description

Create accurate grids in inches or metric to print or share as PNG, PDF or SVG. Includes Paint Tool with built-in color palettes or add colors to create unlimited custom pallets from images, live camera, color wheel, RGB or HSB codes. Place image behind any grid for analysis or artist grid method. No ads or tracking. Purchase includes 3 papers GRID, DIAGONAL, DOT: — GRID — • Set to square or rectangle grid. • Adjust grid line weight. Set grids to an exact size — perfect for knitters and crafters! Up to four line colors on a grid, special feature adds custom line colors. • Label rows & columns with numbers [1,2,3] or letters [A,B,C] and set starting corner, values, and stepping. • Label grid axes. • Place axis and label. • Add diagonal lines to split grid into half- or quarter- triangles. • Place a center-dot with adjustable placement. — DOT (ISOMETRIC) — • 5 dot styles. • Set to isometric or rectangular dot pattern. • Specify exact dot spacing, then connect dots with horizontal, vertical, and diagonal lines. • Place a center-dot anywhere on the page. • Label rows & columns with numbers [1,2,3] or letters [A,B,C]. Set starting corner. — DIAGONAL — • Adjust grid line weight. • Divide & sub-divide blocks. Add spacing between blocks, grid, and center-point. — InApp PURCHASES — Add 8 hard-to-find specialty papers. Buy any five papers (or purchase the ’All Papers Forever’ BUNDLE) to unlock all papers forever. Credit is given for every purchase so that on purchase of any fifth paper the bundle is instantly added: Hexagon Brick Log-Log & Semi-Log Polar Spider Ancestry Music Triangle (Ternary) — FEATURES OF ALL PAPERS — √ Paint Tool. Color grid. Make custom color palettes. Add annotations. √ Place an image under any grid, then adjust size and placement. √ Metric (cm or mm) and Inch settings for grid and page size. √ Choice of Print Settings for standard papers (such as 8.5x11 or A4) with adjustable margins, or set page at a custom size. √ Print or share grids as a PDF, PNG or SVG to other apps for further editing — even as templates to laser or pattern cutting machines. √ Share painted grids as a PNG or PDF. √ Work up close using pinch-n-zoom. √ Show multiple grids on a page with tiling. √ Up to four grid line colors, special feature adds custom line colors. √ Title grid with choice of font, size, bold/italic, and color. √ Place a center-point on several papers. √ Library of templates (Quick Picks) offer inspiration and a short cut to creating grids. √ Purchases work on all devices — iPhone, iPad, and iPod. Don’t see the paper or feature you need? Send an email and we’ll see what we can do!

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

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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.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
Supabase
React Navigation
Shadcn/UI
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

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.