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
German English XXL Dictionary
With the Langenscheidt XXL Expert Dictionary, you’ll always have a reliable and extensive reference work to hand
$69.99
PRICE
$69.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.4
7 ratings · Below Average
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for German English XXL Dictionary: 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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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.
Hypothesis 1
Enhance the database with more entries and examples.
Assumption to check: Limited word database compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Design a modern, user-friendly interface with intuitive navigation.
Assumption to check: Poor user interface and navigation
Validate with people who use this workflow before building.
Hypothesis 3
Include audio pronunciations for a wider range of terms.
Assumption to check: Lack of audio pronunciation for many words
Validate with people who use this workflow before building.
Hypothesis 4
Implement a system for regular updates and user feedback integration.
Assumption to check: Infrequent updates and bug fixes
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
With the Langenscheidt XXL Expert Dictionary, you’ll always have a reliable and extensive reference work to hand. Ideal for professional translations at work or college, as well as for travel and everyday use. _____ Langenscheidt XXL Expert English Dictionary: • Around 1,180,000 headwords, expressions and translations • Translates from and into German (German-English and English-German) • Up-to-date vocabulary from all general language style levels • Extensive specialist terminology from all major fields (like economics, engineering, science, law etc.) • Additional information: examples of use, indicators showing distinctions between various meanings, grammar explanations • A comprehensive reference work for professional translations at the workplace , for teachers and students _____ Application features: • Native iOS 11 support. • Copy / Paste. • No Internet connection necessary: dictionary can be used in flight mode, no roaming charges abroad. • Recordings by native speakers. • Search for anagrams (e. g. tab-bat). • Full-text search: Find examples with perfect ease. • List of similar words produced if search item spelled incorrectly. • Wildcard search finds entries even when correct spelling is not known. • Full search history available. • Inflexion function for search words in all grammatical forms (English only). • Quiz for vocabulary learning. • Favorites - to quickly access frequently searched words. • Choose your own display options: menus, fonts, colours, etc. • Links for translating items within entries. • Improved menu navigation. • Keep up to date: subscribe to our newsletter, become a fan on Facebook and a follower on Twitter.
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
Zustand
React Navigation
Axios
TypeScript
BUILD KIT DIFFICULTY
Intermediate
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.
