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.
*NOTE: there is a newer version of American Heritage® Dictionary available on the AppStore
$16.99 · 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 American Heritage® Deluxe: 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 search functionality often leads to frustration
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point can deter users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of contextual examples for word usage
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Occasional app crashes during heavy usage
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.
*NOTE: there is a newer version of American Heritage® Dictionary available on the AppStore. Tap on the "Enfour, Inc." link for AHD5. ________________________________________ The entire 2,074 page, 7.5 pound dictionary with its nearly 300,000 terms –plus 64 thousand recorded sound files & "Roget's II: The New Thesaurus". • The American Heritage® Dictionary of the English Language • Roget's II: The New Thesaurus ________________________________________ "In the battle of the Big Three dictionaries, American Heritage® stands out on iPhone" (4 mice) — MacWorld ________________________________________ Includes all the functionality of these two titles in one application. This iPhone/iPod touch version has the entire 2,074 page, 7.5 pound dictionary with its nearly 300,000 terms more than 33,000 written examples –plus 64 thousand professionally recorded sound files. Not to mention the complete front matter and appendices, zoomable graphics -all available instantly at your fingertips. Main Features: • entire text of these best selling tomes • complete front matter and appendices • unique three-way cross-referencing search • real-time progressive look-up • wildcard pattern searches (with * ?) • fallback online search for esoteric or archaic words and the latest slang • spelling suggestion dictionary included • hyperlinking to appendices and between books • pop-up pronunciation symbols chart • IPA symbol conversion • etymology (word history) with root links • professionally recorded sound files • zoomable graphics • support for search from other applications • Bookmarks with folders & editable notations • automatic search History • an "AI Teacher" for deeper explanations or help for ESL students in 98 languages • AI boosted anagram generator • "Share" module to search within other apps - with a history feature, so you can study later • "Word-of-the-Day" feature with multiple words sets • "Today" & LockScreen widgets • 3D Touch support • DarkMode support • Open via Siri • iPad Pro multi-screen and Drag & Drop • iPad "Fast App Switching" (Multitasking) • OS-independent app localization • iPhone, iPod, iPad and macOS support • iPhone 17 & iOS26 supported • complete offline use — no Internet connection ________________________________________ "As apps go, only Enfour’s American Heritage® Dictionary stands out for its graphic appeal and functionality. Although I was pleased to have so much lexical firepower in such a compact form, I was annoyed at how poorly the other dictionaries present on the platform." (4 mice) — MacWorld Editor's Choice. ranking = "Great" — MacLife Reviews of the print version: "The Best Dictionary...Designed to appeal to the eye as well as the mind, it is notable for its imaginative illustrations....This is a great family dictionary, and ideal for schoolrooms." — The Courier Journal "This dictionary, now in its fourth edition, makes it fun to look up definitions of words....This up-to-date and eminently useful dictionary features a fabulous full-color design that quickly and effectively guides users to the information they seek." — Library Journal ________________________________________ "The American Heritage® Dictionary of the English Language, Fourth Edition" and "Roget’s II: The New Thesaurus, Third Edition" are published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Houghton Mifflin Harcourt Publishing Company http://www.hmco.com Powered by Enfour's -"UniDict® Engine"
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.