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
Flashcards Deluxe
Flashcards Deluxe is an easy-to-use yet powerful flashcard app designed to help you efficiently learn almost anything.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
335 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 included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Flashcards Deluxe: 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
Implement full offline mode with local data storage
Assumption to check: Limited offline capabilities for studying flashcards
Validate with people who use this workflow before building.
Hypothesis 2
Introduce streaks, levels, and rewards for studying
Assumption to check: Lack of gamification features to engage users
Validate with people who use this workflow before building.
Hypothesis 3
Add tagging and categorization features for better organization.
Assumption to check: Difficulties in managing and organizing large sets of flashcards
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize backgrounds, fonts, and colors on flashcards.
Assumption to check: Limited customization options for flashcards
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
Flashcards Deluxe is an easy-to-use yet powerful flashcard app designed to help you efficiently learn almost anything. Learn languages, prepare for exams, or memorize anything else — your way. • No subscriptions. Pay once. • Optional spaced repetition system (SRS) for efficient studying • Easily create and maintain your own flashcards in a spreadsheet, text file, or directly in the app • Import flashcards created with your favorite AI tool or shared by other users • Highly customizable to fit the way you study • Up to 5 sides per card — go beyond “front and back” with pronunciation, example sentences, definitions, explanations, and more • Offline text-to-speech (TTS) • Multiple choice, spelling tests, and quizzes with exportable results • Add pictures and audio to any side • Rich text formatting using Excel or HTML • Import and export options include OneDrive, Dropbox, Google Drive, email, and our website • Handles very large flashcard sets • View and search cards easily in list view • Run audio slideshows for hands-free practice • Sync across devices Trusted by learners for over a decade, Flashcards Deluxe continues to offer powerful features, great support, and ongoing updates for beginners and advanced users alike. A free Lite version is also available. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Supabase
React Navigation
Zustand
expo-notifications
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.
