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.
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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 BBEdit: map the core Developer Tools 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 functionality compared to desktop counterparts
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor file management options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Basic customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No collaboration features
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.
BBEdit is the leading professional text, code, and markup editor for the Macintosh. As the "go to" tool for web site designers, web application developers, writers, and software developers, this award-winning product provides an abundance of high-performance features for editing, searching, and manipulation of text, code, and HTML/XML markup. As a replacement for TextWrangler, BBEdit is built by the same developers, using the same award-winning technology, and is identical to TextWrangler in every way you're used to. Unlike TextWrangler, BBEdit is Apple Silicon native, and compatible with contemporary macOS versions. An intelligent interface provides easy access to BBEdit’s best-of-class features, including: grep pattern matching; search and replace across multiple files; project definition tools; function navigation and syntax coloring for numerous source code languages; code folding; FTP and SFTP open and save; AppleScript, Automator, and Shortcuts support; Unix scripting support; text and code completion; a complete set of robust HTML tools; and more. BBEdit offers a 30-day evaluation period (beginning the first time you use it on your computer), during which its full feature set is available. During the evaluation period, BBEdit is fully functional. After the evaluation period has expired, you can continue to use BBEdit for free, forever, with no nag screens or unsolicited interruptions. In “free mode”, BBEdit provides a modified set of features, which incorporates a powerful set of core features. Using BBEdit in free mode costs you nothing, while providing an upgrade path to advanced features and capabilities. To enable BBEdit’s advanced features after the evaluation period is over, you will need to have an active BBEdit subscription. Subscriptions are available on either a monthly or annual basis. An active subscription gives you access to all of BBEdit’s advanced features, including any new features that we introduce during updates or major upgrades, for as long as the subscription is in good standing. Please see our comparison chart for a detailed listing of which advanced features are available with a subscription. Subscription terms and conditions: We do not collect any data from your use of BBEdit, whether or not a subscription is in effect. Your interactions with BBEdit and with Bare Bones Software, Inc. are protected by our privacy policy. Your use of BBEdit is governed by the terms of its end-user license. When you purchase a subscription, payment will be charged to your iTunes Account upon confirmation of purchase. Your subscription will renew automatically, unless you cancel your subscription at least 24 hours prior to the end of the currently active subscription period. Your iTunes Account will be charged for the renewal within 24 hours prior to the end of the currently active subscription period, and your account history will reflect the cost of the renewal. You can manage your subscription and cancel automatic renewal by going to your "Manage my Subscriptions" page after purchase. Purchasing a subscription will permanently end your evaluation period, and forfeits any unused portion of the evaluation period, if applicable. For the full text of the BBEdit end user license for Mac App Store customers, please visit this page on our web site: https://www.barebones.com/products/bbedit/appstore/terms.html
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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.