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
LP Old English
The Old English language is at once recognisable and unfamiliar: many words resemble ones that are used today, but their meanings are not always the same, and they can take many more forms than in the modern language
$3.99
PRICE
$3.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
161 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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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 LP Old English: map the core Education 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
Add gamification features to encourage user engagement
Assumption to check: Limited interactive elements for engaging learning
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline downloads for lessons
Assumption to check: No offline access to lessons
Validate with people who use this workflow before building.
Hypothesis 3
Create a more visual progress dashboard
Assumption to check: Lack of progress tracking visualization
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a feature to share progress and achievements on social media
Assumption to check: No social sharing features
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
The Old English language is at once recognisable and unfamiliar: many words resemble ones that are used today, but their meanings are not always the same, and they can take many more forms than in the modern language. Liberation Philology Old English helps you master these complexities by practice. Wherever you have your phone handy, it is ready to drill you on Old English vocabulary and grammar with a continuous multiple-choice test. Your answers are immediately confirmed or corrected, and reinforced through repetition. • Vocabulary: 150 levels of general vocabulary, each testing the translation of 10 words between modern and Old English. A further 330 levels cover the vocabulary of Beowulf in approximate sequence. Interspersed among these are cumulative levels reviewing what has been learned earlier (giving a total of 542 levels). • Nouns: Tests your ability to parse and decline all classes of Old English nouns. • Verbs: Tests your ability to parse and conjugate a full range of weak, strong, and irregular verbs in Old English. A further Reference module allows you to review the vocabulary word-list and the noun and verb paradigms.
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
React Native Paper
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.
