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.
The wealthiest city in history had rules about money
$6.99 · 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 Richest Man in Babylon: map the core Books 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 user engagement features.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of personalization options.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline reading mode.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Single purchase with no trial options.
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.
The wealthiest city in history had rules about money. Rules that still work today. Now you can learn them and prove you understand them. Read the complete text, then prove you understood it. Every chapter ends with scenarios that challenge your financial thinking. One correct answer. Get it right and earn XP. Get it wrong and learn exactly why. Every answer comes with an explanation. 12 CHAPTERS. 36 SCENARIOS. 8 GAMES. THE TRAINING BEGINS. 8 GAMES. ENDLESS REPLAY. Sliding Puzzle. Reassemble Babylonian cover art, tile by tile. Memory Match. Flip cards and find matching pairs from ancient Babylon. Guess the Chapter. See a cover, name the chapter. Two Truths & a Lie. Spot the false statement hidden among truths. Who Said It? Match passages to the right chapter. Name That Chapter. Identify chapters from theme clues. Moral Compass. Connect chapter lessons to their source. Principle Match. Link financial principles to their chapters. Chapter Spinner. Spin and land on a random chapter. Every game pulls from all 12 chapters. Every round is different. WHY READERS LOVE IT New rounds every time you play. No two games are the same. Puzzles challenge your eye for detail. Memory match sharpens your brain. Trivia tests what you really remember. Babylonian cover art on every card. Instant feedback after every answer. No loading screens. No waiting. Just tap and play. PLAY ANYTIME, ANYWHERE No internet needed. No login required. Open the app and start playing in seconds. On the bus, in bed, waiting in line. Your games, your pace, your wealth training. PRINCIPLES THAT HAVE STOOD THE TEST OF TIME These are not abstract theories. They are practical rules that people have followed for nearly a century to pay off debt, build savings, and invest wisely. The app organizes them into 30 clear principles across 6 categories: saving, investing, protection, wisdom, earning, and debt. Tap any principle to jump straight to the chapter it comes from. LEVEL UP FROM APPRENTICE TO ARKAD Every correct answer earns XP. Climb through 5 ranks: Apprentice, Merchant, Trader, Gold Lender, Arkad. Unlock 12 achievements. Build a daily streak. Watch your progress grow across all 12 chapters. This is not passive reading. This is a challenge. DAILY CHALLENGE One new question every day from across all 12 chapters. Quick. Sharp. Addictive. How long can you keep your streak alive? EXPLORE ANCIENT BABYLON 53 glossary terms covering financial concepts, ancient Babylonian culture, and historical persons. 13 historical entries spanning nearly 4,000 years of financial wisdom. 6 curated reading paths for thematic journeys through the book. The deeper you go, the more you discover. LISTEN AND PROSPER Put on your headphones and let the text read itself to you. Every chapter plays as continuous narration, one after another, on your commute, in bed, or before you sleep. Background playback, lock screen controls, with adjustable narration voice and speed. BEAUTIFUL. OFFLINE. YOURS. Dark mode with Lapis Lazuli Blue accents. Elegant serif typography. No internet required. No account needed. No ads. No distractions. Just you and the wisdom of Babylon. ONE PRICE. EVERYTHING UNLOCKED. All 12 chapters. All 36 scenarios. All 8 games. Audiobook narration for every chapter. Every principle, glossary term, reading path, daily challenge, and achievement. No subscriptions. No in-app purchases. No ads. Ever. Your journey to financial strength starts here. Enter Babylon. SUPPORT Questions or feedback? [email protected] Privacy: https://pages.stackbase.space/babylon/privacy-policy Terms: https://pages.stackbase.space/babylon/terms-of-service
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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.