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
AmbiPad
ambipad is an ipad/iphone drawing app specialized for creating ambigrams (text designs that can be read the same way even when turned upside down or viewed from different angles).
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 AmbiPad: map the core Graphics & Design 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
Include more tools and options for users to personalize their designs.
Assumption to check: Limited functionality for design customization
Validate with people who use this workflow before building.
Hypothesis 2
Implement a gallery feature where users can showcase and share their designs.
Assumption to check: Lack of community features for sharing designs
Validate with people who use this workflow before building.
Hypothesis 3
Add an onboarding tutorial to guide new users through app features.
Assumption to check: No tutorial or onboarding for new users
Validate with people who use this workflow before building.
Hypothesis 4
Provide multiple formats for exporting designs, including social media sharing.
Assumption to check: Limited export options for designs
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
ambipad is an ipad/iphone drawing app specialized for creating ambigrams (text designs that can be read the same way even when turned upside down or viewed from different angles). with intuitive controls, anyone can easily create beautiful ambigrams. just draw a single line and the symmetrical line will automatically appear, allowing you to create designs that can be viewed from both directions. we've incorporated various symmetry modes ideal for ambigram creation, including point symmetry, line symmetry (horizontal, vertical, diagonal), and 90-degree rotation. you can freely edit lines while maintaining symmetry, cut them with the scissors tool, and move or rotate selected parts, making it possible to create complex ambigram designs just as you imagine them. customization options are plentiful, including four color themes (standard, inverted, blue, brown), and the ability to change line thickness and end styles. completed works can be saved and shared in png or svg format. supports japanese, english, and french. comfortable to use on both ipad's large screen and iphone. enjoy the world of ambigrams with ambipad.
Written user reviews are not shown here. Check current App Store reviews >
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
@supabase/supabase-js
react-native-reanimated
expo-router
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.
