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.
Think, plan & create – Concepts is a flexible vector-based sketchbook where you can take your ideas from concept to reality.
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Concepts: 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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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
Assumption to check: Limited free features compared to premium offerings.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Laggy performance on older devices.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficult to navigate through many tools and options.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent saving of projects.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Think, plan & create – Concepts is a flexible vector-based sketchbook where you can take your ideas from concept to reality. Concepts reimagines the ideation process – offering a safe and dynamic workspace to iterate and explore your ideas, organize your thoughts, and experiment with designs. With our infinite canvas, you can: • Sketch plans and whiteboard ideas • Make notes, doodles, and mindmaps • Draw storyboards, product sketches and designs Concepts is vector-based, making every stroke editable and scalable. With our Nudge, Slice and Select tools, you can easily change any element of your sketch without redrawing it. Talented creators at Disney, Playstation, Philips, HP, Apple, Google, Unity and Illumination Entertainment use Concepts to develop and realize extraordinary ideas. Join us! Concepts has: • An infinite canvas with optional paper types and grids • Realistic pens, pencils and brushes that flow with pressure, tilt and velocity or create your own • A tool wheel or bar you can personalize • HSL, RGB and COPIC color wheels • Editable vector-based sketching – move, organize and edit the tool, color, size, scale, smoothing, opacity; transform or nudge lines to shape them • Unlimited layers • Scale and measurement tools that calculate real-world dimensions With Concepts, you can: • Drag + drop images + PDF files • Create, store and share vector Object libraries • Export images, vector SVG + PDFs to scale for printing or efficient flow between apps (including Procreate, Sketchbook, AutoCAD and Adobe) • Share directly to email, text, Files, cloud, photos, or your favorite social apps and present with AirPlay or a second screen • Store your work safely in your personal iCloud Drive FREE FEATURES • Infinite canvas • A selection of paper, grid types & tools to get you started • The full COPIC color spectrum, RGB and HSL color wheels • Five layers • Unlimited drawings • JPG exports PAID FEATURES Subscription: • 200+ brush and Object libraries, features, and services • Enjoy Team Sharing for smooth collaboration, including live-sharing of object libraries, color palettes & brushes, with new updates arriving all the time • Unlocks everything across platforms • TRY PREMIUM FREE FOR 7 DAYS One-time-purchases: • Buy the Essentials for life and unlock selection & editing tools, infinite layers, shape guides, custom brushes, custom grids, and exports to PNG / PSD / SVG / DXF. • Pay for advanced features as you need them – object packs & professional brushes are sold separately • Limited to the platform you purchase on Terms & Conditions: • Monthly and yearly subscription payments are charged to your iTunes account at the time of purchase. • Your plan will renew automatically at the end of the billing period unless canceled 24 hours before the billing period ends. • You can cancel or make changes to your subscription at any time in your iTunes Account settings. • Unused portions of any free trial period are forfeited if you make changes to your subscription. We’re dedicated to quality and update frequently based on your feedback. Your experience matters to us. Chat with us in-app via Ask Us Anything, email us at [email protected], or find us anywhere with @ConceptsApp. COPIC is the trademark of Too Corporation. Many thanks to Lasse Pekkala and Osama Elfar for the cover art!
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.