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
Sharpen - College Exam Prep
Sharpen is the new college study app that revolutionizes exam prep
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
3,121 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 included17 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 Sharpen - College Exam Prep: 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 a more intuitive categorization and search feature.
Assumption to check: Users often find it difficult to navigate through extensive course materials.
Validate with people who use this workflow before building.
Hypothesis 2
Provide full course download functionality for offline studying.
Assumption to check: Limited offline access to materials.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance the quiz framework for more accurate scoring and feedback.
Assumption to check: Some users report bugs in the quiz scoring mechanism.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce adaptive learning paths based on user performance and preferences.
Assumption to check: Lack of personalized study paths.
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
Sharpen is the new college study app that revolutionizes exam prep. Sharpen assesses your current knowledge, identifies areas for improvement, and provides personalized AI-driven study recommendations to boost your exam readiness. Choose from three quiz modes, flashcards, bite-sized videos, chapter summaries, and practice problems, all seamlessly aligned with your college textbook. Or use Ask Sharpen, your AI study buddy, to break down topics and generate new study content tailored to your queries. Features: NEW Ask Sharpen: Enter queries and Sharpen’s AI engine provides deep-dives, links you to related study activities, and generates new learning content. NEW Improve: AI-driven insights show your strengths, knowledge gaps, and personalized study recommendations based on past sessions. Quiz Bank: Thousands of questions across three modes (basic, advanced, and exam). Exam-like Questions: Fill-in-the-blank, multiple choice with images, standard multiple choice, and single choice. Exam Timer: Simulate the exam environment with a built-in timer. Bite-Sized Videos: Concise videos that explain key concepts. Flashcards: Learn key terms from your textbook. Step-by-Step Practice Problems: Reinforce understanding with detailed practice problems. Visual Chapter Summaries: Summarize chapters visually for better retention. Trusted Content: Content built by McGraw Hill subject matter experts and aligned to your textbook. Disciplines covered: McGraw Hill Textbooks & OpenStax Textbooks: Accounting, Algebra, American Government, American History, Anatomy & Physiology, Biology, Business, Business Law, Business Math, Chemistry, Economics, Engineering, Human Resources, Investments, Management, Marketing, Medical Assisting, Medical Terminology, Microbiology, Music, Nutrition, Psychology, Spanish, and others. Testimonials: “I’m rocking the exams and my understanding in class thanks to Sharpen.” “This app is amazing! It gets right to the point & connects with my book for school.” “Fantastic resource! I love the bite-sized lessons, quizzes, and design.” Download Sharpen today and experience a simpler, more effective way to study for exams and class. 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
React Native
Expo
Supabase
Zustand
React Navigation
React Native Reanimated
BUILD KIT DIFFICULTY
Advanced
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.
