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
Numberblocks Treasure Hunt
Ahoy there, Number Explorers! Are you ready for the number adventure of a lifetime? Grab your pirate hats and set sail to Hexagon Island for an epic, numbery Treasure Hunt! Pick between three adventures and help train...
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.1
12 ratings · Top 30%
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/
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 Numberblocks Treasure Hunt: 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
Introduce new games regularly and user-generated content.
Assumption to check: Limited variety of games can lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Enable offline play for downloaded activities.
Assumption to check: Lack of offline functionality.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify and clarify subscription options.
Assumption to check: Subscription model can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Add detailed progress reports and achievement systems.
Assumption to check: Limited progress tracking features.
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
Ahoy there, Number Explorers! Are you ready for the number adventure of a lifetime? Grab your pirate hats and set sail to Hexagon Island for an epic, numbery Treasure Hunt! Pick between three adventures and help train the Numberblocks in a series of BRAND-NEW games, all designed to help develop your little learner's number sense, the foundation for mathematical fluency. Legend has it that rascly pirate, Captain Hexbeard, has buried her treasure across the island; complete the challenges and be in with a chance to win some to take back to the mainland! NUMBERBLOCKS TREASURE HUNT is brought to you by Early Years Foundation Stage experts and the BAFTA-award-winning animation studio, Blue Zoo Productions, creators of Alphablocks, Numberblocks & Colorblocks. What's included in Numberblocks Treasure Hunt? 1. Help train the Numberblocks in six BRAND-NEW games, each aligned with teaching & reinforcing different number sense skills. 2. A narrative based journey to Hexagon Island with never seen before animations. 3. Three different adventures to choose from - Gold, Diamond & Crystal - each featuring different Numberblocks. 4. Explore the island alongside rascly pirate, Captain Hexbeard, as well as your favourite Numberblocks. 5. Learn about the Numberblocks' Clubs and put your knowledge to the test. 6. Apply your Number Explorer knowledge to the real world in More to Explore. 7. Complete all six challenges to win some of Captain Hexbeard's famous treasure, as well as Number Explorer certificates. 8. Designed by educational experts and experts in play. 9. This app is entertaining and safe, being COPPA and GDPR-K compliant and 100% ad-free. Privacy & Safety At Blue Zoo, your child’s privacy and safety is the first priority for us. There are no ads in the app and we will never share personal information with any 3rd parties or sell this on. You can find out more in our Privacy Policy and Terms of Service: Privacy Policy: https://blocks-website.webflow.io/privacy-policy Terms of Service: https://blocks-website.webflow.io/terms-of-service
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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
React Navigation
React Native Reanimated
TypeScript
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.
