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
Cursa - Learn anything
Study online with over 5,000 free video or audio courses and more than 60,000 exercises.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
5,614 ratings · Top 5%
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 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 Cursa - Learn anything: 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 course downloads.
Assumption to check: Limited offline access to content
Validate with people who use this workflow before building.
Hypothesis 2
Use AI to provide personalized course suggestions.
Assumption to check: Generic course recommendations
Validate with people who use this workflow before building.
Hypothesis 3
Introduce discussion boards or forums for course topics.
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate gamification elements like XP, levels, and daily challenges.
Assumption to check: Inconsistent user engagement
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
Study online with over 5,000 free video or audio courses and more than 60,000 exercises. All courses include a free and valid certificate, which can be issued upon completion. Study at your own pace with AI-generated study plans, practical exercises, educational stories, articles, and extra resources — all 100% free! All online courses are free + free certificate _______________________________________________ Learn anything you can imagine. Our app features online courses with exercises in all areas of knowledge. Free and valid Digital Certificates _____________________________________________ Upon completing a free online course, you can issue a Free Certificate with a digital signature. Your certificate is saved in the gallery and sent by email, ready to share on resumes and professional networks like LinkedIn. Artificial Intelligence to help you in your studies and professional life _________________________________________________________________________ Cursa's artificial intelligence creates personalized study plans, helps you find ideal courses for you, and find job openings compatible with your profile. Areas of study with free courses ::: Discover thousands of free online courses with certificates: _____________________________________________________________________________________________________________ ONLINE INFORMATION TECHNOLOGY COURSES Web Development, HTML, CSS, JavaScript - 53 courses Programming languages ( Python, Ruby, Java, C ) - 44 courses Excel, Word, LibreOffice - 34 courses Artificial Intelligence - 27 courses Database ( MySql, SQL ) - 30 courses App Development - 35 courses Web Servers and Cloud Computing - 21 courses Cyber Security - 18 courses Software testing - 15 courses Backend development - 20 courses Game development - 22 courses IT Tools - 17 courses Operational Systems - 9 courses Programming logic - 8 courses Maintenance of computers and notebooks - 4 courses Basic informatics - 12 courses ONLINE BUSINESS ADMINISTRATION COURSES Digital Marketing, Entrepreneurship and Management, Human resources, Investments, Project Management, Business Skills, Accounting, Ecommerce and Sales, Corporate Finances, Purchasing management, Political.. ONLINE LANGUAGES COURSES English, French, Spanish, German, Japanese, Italian, Korean, Chinese / Mandarin, Portuguese, Russian, Sign Language and Polish. ONLINE PROFESSIONALS COURSES Electrician, Customer service, Culinary, Engineering and Mechanics, Logistics and Supply Chain, Construction, Fashion, Cutting and Sewing, Car and Motorcycle repairs, Cashier and Bank teller, Mobile phone repairs, Welding, Property and Private Security, Refrigeration and Air conditioning, Journalism, Woodworking, Realtor, Farming, Crafts and Other Professions. ONLINE HEALTH COURSES First aid, Nutrition and Weight loss, Physiotherapy, Nursing, Psychology, Physical exercises to a health life, Anatomy, Pharmacology, Child Care, Physiology, Veterinary and more in health and Medicine. ONLINE DESIGN and ART COURSES Graphic Design, UX User experience, Image edition, Drawing and Painting, Architectural design, Video edition and Video animations. ONLINE BASIC STUDIES COURSES Algebra, Grammar, Physics, Biology, History, Economics, Logical reasoning, Literature, Sociology, Geography, Calculus, Statistics, Chemistry, Geometry, Trigonometry, Philosophy. ONLINE INSTRUMENTS AND VOCAL COURSES Sing, Classical Guitar, Piano, Music production and DJ mixing, Flute, Drums, Violin, Electric guitar, Bass, Saxophone and Clarinet, Ukelele. ONLINE AESTHETICS COURSES Makeup, Nails, Manicure and Pedicure, Skin care, Barbershop, Eyebrow design and Hair care. ONLINE OTHERS COURSES Sports, Photography, Massage therapy, Instagram and TikTok influencer, Astronomy, Astrology, Youtuber, Magic and Hypnosis, Table and Card games, Robotics, Theology, Theather and Film making, and Dance. - 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
Zustand
react-navigation
Supabase
@react-native-video
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.
