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.
chess openings wizard is where tournament players go to work on their openings.
$6.99 · 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.
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Combine features and design from your favorite apps.
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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 Chess Openings Wizard: 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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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 content updates can lead to user stagnation
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in tracking progress across openings
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of interactive practice features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription model might deter new users
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.
chess openings wizard is where tournament players go to work on their openings. the app is based on the bookup program that first came out in 1984. the app has full editing and training power like its brethren apps on macintosh and windows. openings can be moved back and forth to the macintosh, windows, and android versions. chess openings wizard does not play chess, nor does it come with a game collection. it is meant for designing openings for white and defenses for black, and then testing the player's knowledge of the lines by playing mock games. sample ebooks include an opening guide (thousands of named and categorized opening positions accessible through any move order), an eco master framework, and the white and black repertoires of magnus carlsen, fabiano caruana, and robert fischer. it also includes a demo ebook with excerpts from a highly annotated repertoire in the open game. chess openings wizard has a dedicated pocketgm server giving you full speed stockfish analysis. (internet connection required.) the pedigree ribbon shows the results of games in each opening position but uses only games between two super gms. that way you know if the move is trusted by the best players. (and it's important to know if a move has never been played by a super gm when facing another super gm.) this is the same feature found in chess openings wizard professional for macintosh and windows. the short version is: if you are designing an opening with a game database app or with a playing program, you're working too hard. chess openings wizard contains 42 years of refinements, with precisely the tools that a tournament player requires to prepare openings fast.
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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.