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.
15+ million downloads
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Clever: Brain Training Games: 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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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
Assumption to check: Limited variety of games may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users report difficulty with game instructions.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can feel mandatory for full experience.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features for competing with friends.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
15+ million downloads 4.7 worldwide rating App of the Day in 165+ countries Clever is more than a brain training app—it's a complete toolkit for improving memory, boosting focus, and understanding how your mind works. With adaptive games, cognitive tests, and personalized training plans, Clever helps you strengthen essential skills through short, effective daily sessions. Struggle to stay focused? Forget things easily? Want to think faster? Clever trains your memory, attention, logic, and problem-solving with structured, engaging workouts. What You Get With Clever • 40+ brain training games for memory, focus, logic, math, and language • Brain Training Marathon with progressive levels and daily streaks • Adaptive difficulty for continuous growth • 15+ cognitive and self-discovery tests with insights • Detailed progress tracking with trends and statistics Clever fits any schedule—from quick 5-minute sessions to deeper daily training. TRAIN YOUR BRAIN DAILY Build a consistent habit with the Brain Training Marathon. Progress through structured levels, maintain streaks, and improve memory, focus, and processing speed with sessions that adapt to your level. PLAY ENGAGING BRAIN GAMES Train different cognitive skills with games like Chemical Sort, Memory Eclipse, Cross Math, Word Circle, Pin Connect, One Line, and Color Check. Each challenge strengthens logic, attention, and problem-solving through short exercises. IMPROVE MEMORY AND FOCUS Strengthen recall, concentration, and mental endurance with interactive sessions designed to keep your mind active. DISCOVER YOURSELF WITH TESTS Explore cognitive and self-discovery tests including IQ, ADHD, Mental Age, Burnout, Temperament Type, Impostor Syndrome, Procrastination, Childhood Trauma, and awareness checks for Dementia and Alzheimer’s. Each test provides insights and personalized recommendations. TRACK YOUR PROGRESS Monitor improvement across memory, focus, logic, and math with detailed statistics, trends, and streak tracking. What Users Say About Clever “Interesting, fun, and challenging tasks that really test problem-solving skills.” “A great way to keep the brain active and healthy with regular play.” “Once I started trying the games, I couldn’t stop—very engaging.” “Perfect short sessions that make daily brain training easy.” Millions of users rely on Clever to stay mentally active and build consistent brain training habits. PREMIUM ACCESS Unlock unlimited access to all games, tests, Brain Training Marathon levels, personalized plans, and advanced analytics. Enjoy an ad-free experience and full customization. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage your subscription anytime in your App Store settings. Disclaimer: This app provides informational content for self-reflection and is not a substitute for professional medical advice. Terms of Use: http://drumpadapps.com/terms-of-use Privacy Policy: http://drumpadapps.com/privacy-policy Contact: [email protected]
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.