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.
App Overview
LookUp: English Dictionary App
Build your English vocabulary the smart way
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.7
3,120 ratings · Top 15%
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.
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A product spec, screen plans, and build steps for your coding agent.
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What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Build your English vocabulary the smart way. LookUp combines an Oxford-powered dictionary with beautiful Word of the Day, spaced repetition quizzes, and personal word collections, all in one award-winning app. Discover words beautifully: A new illustrated Word of the Day, every day. Visual memory aids make new words stick faster than reading definitions alone. Tap the widget on your Home Screen or Lock Screen to never miss a word. Look up any word, instantly: Powered by Oxford English Dictionary; the world's most trusted source. Get definitions, thesaurus, audio pronunciations, example sentences, usage notes, and translations in 20+ languages. Build your personal vocabulary: Save words to your own collections. Then master them with flashcards, example sentence quizzes, conversation practice, and interactive exercises — all powered by scientifically proven Spaced Repetition. Perfect for exams & every day life: Whether you're prepping for GRE, SAT, TOEFL, IELTS, or simply a lover of words. LookUp is built for anyone serious about language. App Store Editor's Choice · Webby Honoree 2021 · MacStories Update of the Year 2019 "Far and away my favorite dictionary app." - MacStories — *Translations Supported for: Arabic, Chinese, Hindi, Indonesian, Malay, Turkmen, Tajik, German, Italian, Greek, Portuguese, Romanian, Russian, Spanish, Tatar, Igbo, isiXhosa, isiZulu, Northern Sotho, Setswana, Yoruba, Tok Pisin, and more to come. LookUp+ Terms of Use: https://squircleapps.com/lookup/terms/ Standard Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
