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.
Warbler Guide App
$12.99 · 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.
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 The Warbler Guide: map the core Reference 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 offline access to data
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point for app download
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficulties in finding specific birds
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social sharing options
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.
Warbler Guide App Tom Stephenson & Scott Whittle Winner of the 2016 PROSE Award for Best App/eProduct The Warbler Guide App is the perfect companion to Princeton’s revolutionary and widely acclaimed book The Warbler Guide, by Tom Stephenson and Scott Whittle. Whether for study or field use, this innovative app delivers the full power of The Warbler Guide in your pocket—plus unique new app-only features. The app allows you to identify birds by view or song, quickly and intuitively. Exciting new 3D graphics enable you to view a bird from the exact angle you see it in the field. And the whole range of warbler songs is easily played, compared, and filtered. Breakthrough features from The Warbler Guide book that are included in the app: • Rapid and confident two-step ID process using visual finders and comparison species • The first complete treatment of warbler songs, using a new objective vocabulary • An intuitive visual finder that includes side, 45-degree, and undertail views • Master Pages with detailed ID points • Complete guide to determining the age and sex of warblers with photos of all ages and sexes • Annotated sonograms showing song structure and key ID points • Complete songs, chip calls, and flight calls for all species • Comparison species for making confident visual and audio IDs • Many additional photos to show behavior and reinforce key ID points • Highlighted diagnostic ID points • Color Impression Icons for narrowing down ID of warblers from the briefest glimpses • Behavior and habitat icons Unique new app-only features: • 3D models of birds in all plumages, rotatable and pinch-zoomable to match field experience of a bird • Intuitive, visual, and interactive finders with filters for possible species based on audio and visual criteria chosen by the user • Playback of all songs and vocalizations with sonograms makes study of vocalizations easy • Selectable finder sortings grouped by color, alphabetical order, song type, and taxonomic order • Interactive song finder using objective vocabulary for fast ID of unknown songs • Simultaneous visual and song finders make identifying an unknown warbler even easier • Half-speed song playback allows for easier study of song structure • Comparison species with selectable side, 45 degree, and undertail views • Features 75 3D images • Covers 48 species and 75 plumages • Includes 277 vocalizations, 156 songs, 73 contact calls, and 48 flight calls • Detailed "how to use" tutorial screens Requires iOS 7.0 or later Tom Stephenson’s articles and photos have appeared in Birding and Bird Watcher’s Digest, at Surf-birds.com, and in the Handbook of the Birds of the World. He has guided groups across the United States and Asia. A musician, he has had several Grammy and Academy Award winners as clients, and was director of technology at Roland Corporation. Scott Whittle lives in Cape May, New Jersey, and has twenty years of experience as a professional photographer and educator. He holds an MFA in photography from the School of Visual Arts in New York, is a fellow of the MacDowell Colony, and is a onetime New York State Big Year record holder.
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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.