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
twofold - shared finances
Twofold is a household finance app built for couples who want clarity without connecting a bank.
$1.99
PRICE
$1.99
No 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/
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 twofold - shared finances: map the core Finance 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
Emphasize user testimonials and simpler onboarding processes.
Assumption to check: Lack of user reviews indicating trust and usability
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate budget tracking with alerts and visualizations.
Assumption to check: Limited features for budget tracking
Validate with people who use this workflow before building.
Hypothesis 3
Implement a straightforward recurring expense feature.
Assumption to check: Difficulties in managing recurring expenses
Validate with people who use this workflow before building.
Hypothesis 4
Allow bank account linking for automatic transaction imports.
Assumption to check: No integration with bank accounts
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
Twofold is a household finance app built for couples who want clarity without connecting a bank. Organize cash, bank accounts, e-wallets, and cards into wallets — folio-style groupings that make your money easy to scan. Switch between Mine (just yours) and Ours (shared with your partner) to see the right balances at the right time. WHY TWOFOLD • Built for two — pair with a code and share joint wallets and transactions • Calm, tactile design — premium fintech feel without the noise • Manual tracking you control — you enter balances and activity; we are not a bank • Week at a glance — spent, earned, and net on the Ledger • Accounts that look like a wallet — cash, bank, credit, loans, and more • Push alerts — optional notification when your partner logs a shared expense HOW IT WORKS 1. Create wallets (Spending, Savings, Travel, Household, and more) 2. Add accounts to each wallet with current balances 3. Log expenses, income, and transfers in the Ledger 4. Pair with your partner to share Ours PRIVACY & CONTROL • Sign in with email — no social login required • Delete your account anytime from Profile • Data syncs securely via our backend; read our Privacy Policy in the app Twofold does not move money, offer loans, or provide investment advice. It is a shared notebook for your household finances — designed to reduce “wait, who paid for that?” moments. Questions? Visit Support from Profile or https://mrkrphl.github.io/pocketsync-legal/support.html
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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
Firebase
TypeScript
Zustand
React Navigation
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.
