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
Future Interests Made Simple
This app is a MUST for any 1L law student studying Estates, Future Interests, and the Rule Against Perpetuities
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
20 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 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 Future Interests Made Simple: 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 a more diverse and engaging category system.
Assumption to check: Limited exploration features and categories.
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing options and community features.
Assumption to check: Lack of social features for interest sharing.
Validate with people who use this workflow before building.
Hypothesis 3
Enable offline access for added convenience.
Assumption to check: No offline access to interests.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate machine learning for personalized interest suggestions.
Assumption to check: No personalized recommendations based on user behavior.
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
This app is a MUST for any 1L law student studying Estates, Future Interests, and the Rule Against Perpetuities. Are you at all confused with these concepts? Do you need more practice problems (with detailed explanations)? This app provides step-by-step instructions to guide even the most confused student through the seeming maze of doctrines and rules. Drawings and diagrams, along with multiple examples and explanations, clarify each concept. Mnemonic devices enable mastery of foreign terminology. An easy-to-navigate App Map makes every topic and page instantly accessible. Sixty practice problems provide detailed explanations with each answer -- grouped according to difficulty level. This app will teach you future interests. This app was created by Professor Ned Snow. Professor Snow is a Professor of Law at the University of South Carolina, and a graduate of Harvard Law School. He has taught future interests for nine years in his Property and Estates & Trusts classes.
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
React Navigation
Zustand
React Query
BUILD KIT DIFFICULTY
Starter
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.
