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.
Top-selling dictionary app since 2008 • Every translation you need PLUS verb conjugations in all tenses • No internet connection required!
$14.99 · 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 Ultralingua Portuguese-English: 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 language options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High one-time purchase price
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No community features for users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Occasional slow loading times
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.
Top-selling dictionary app since 2008 • Every translation you need PLUS verb conjugations in all tenses • No internet connection required! "For serious language students and translators who are looking for more precision." - The New York Times Featured by Apple as "What's Hot" and "Staff Favorite" "Although I am fluent in both English and Portuguese, there are always those words that escape me in conversation, most commonly when referring to technical, academic, political, scientific, or other complex subjects. Parabens, Ultralingua e obrigado pra este applicativo no meu iPhone!" - User review "I have lived in Brasil for 12 years and read/write/speak Portuguese. I'm familiar with most of the available dictionaries but have never seen one as good and as useful as this one. This is a quality product worth much more than the $20 price!" - User review Ultralingua makes apps for people who love languages. Our Portuguese-English dictionary has all the definitions and translations you need, along with extra features that help you get the most out of the dictionary. The verb conjugation tool has complete conjugations for thousands of verbs in all standard forms, and the number translator converts numerals into Portuguese or English text instantly! DICTIONARY: • Over 60,000 entries with 165,000 translations • Tap-and-hold any word or phrase and choose "Speak" from the popup menu to hear that word spoken using Apple's built-in text-to-speech feature. • Slang, technical language, and regional differences in spelling and usage • Hundreds of usage notes about troublesome constructions • Smart search results in case you misspell or mistype • Search-as-you-go displays words and narrows your selection as you type VERBS: • Conjugations for thousands of Portuguese and English verbs • Includes all standard tenses and forms • Smart search finds infinitives and catches misspellings • Must-have reference tool for any student or language professional • On iPhone/iPod touch, conjugate a verb from the dictionary results by tapping it MORE: • Translate numerals into Portuguese and English text with the number tool • Language swapper button to switch from Portuguese-English to English-Portuguese • Tap the history button to view the 50 most recent dictionary definitions, verb conjugations, and more in one place. Sort the list alphabetically or by date, and choose to clear the list completely or delete one entry at a time. • No internet connection required • Change your device settings to view the app display in English, Spanish, French, Italian, Portuguese, or German This universal app will run on iPad, iPhone, and iPod touch, so you can purchase it once and load it onto all your devices. The iPad and iPhone/iPod touch versions look and behave differently to give you a great experience on every device you own. The interface will change, but you’ll always have the same outstanding language data and tools inside. Dictionaries are available from Ultralingua for many languages, including combinations of English, Spanish, French, Italian, Portuguese, German, and more. See what else we have to offer by searching for Ultralingua in the App Store. Follow us on Twitter and become a fan on Facebook for app news, language learning tips, and more: http://www.twitter.com/ultralingua http://on.fb.me/ifI8Hy
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.