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
PayPal - Pay, Send, Save
PayPal is a smart way to securely shop in-store and online, earn rewards points on brands you love, send money and much more.
Free · In-app purchases
OVERALL US RANK
#47
Free · all categories
REVENUE (Est)
$193K/mo
$111K - $276K
RATING
★ 4.8
6,298,633 ratings · Top 5%
Evidence scope: #47 is the current overall US Free chart position. 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 included18 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 PayPal - Pay, Send, Save: 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
Implement lower fees or no fees for certain transactions.
Assumption to check: High fees for transactions
Validate with people who use this workflow before building.
Hypothesis 2
Provide 24/7 chat support within the app.
Assumption to check: Limited customer support options
Validate with people who use this workflow before building.
Hypothesis 3
Optimize backend for faster processing.
Assumption to check: Slow transaction processing times
Validate with people who use this workflow before building.
Hypothesis 4
Simplify onboarding process and provide tutorials.
Assumption to check: Confusing user interface for new users
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
PayPal is a smart way to securely shop in-store and online, earn rewards points on brands you love, send money and much more. SHOP WITH PURCHASE PROTECTION Get built-in protection before and after you buy, with support when something doesn't go as planned. *PayPal Purchase Protection is available on eligible transactions. See terms and limitations: https://www.paypal.com/us/legalhub/paypal/buyer-protection EARN POINTS ON EVERYDAY PURCHASES WITH THE PAYPAL DEBIT CARD Choose a monthly category and earn 5% back in rewards points on up to $1000 spend/month. Terms apply: http://paypal.com/rewardspal No monthly fees. The PayPal Debit Mastercard® is issued by The Bancorp Bank N.A. ("The Bancorp"), pursuant to a license by Mastercard International Incorporated and may be used everywhere Mastercard is accepted. Mastercard and the circles design are registered trademarks of Mastercard International Incorporated. The Bancorp is issuer of the Card only and not responsible for the associated accounts or other products, services, or offers from PayPal. PayPal is a financial technology company, not a bank. The Card is linked to your PayPal Balance account. See PayPal Balance Terms and Conditions: https://www.paypal.com/us/legalhub/pp-balance-tnc#holding SEND AND REQUEST MONEY, SECURELY & IN SECONDS Send money fast within the US and internationally to 110+ countries. Encrypted payments help keep financial details private and secure. BUY NOW PAY LATER In store single-use card is valid for one purchase and must be used within 24 hours of loan approval. *Pay in 4 is available upon approval for purchases of $10 - $2000 and is currently not available to residents of MO. 18 years old or older to apply. The lender for Pay in 4 is PayPal, Inc. (NMLS #910457). Loans to CA residents are made or arranged pursuant to a CA Financing Law License. RI Small Loan Lender Licensee. NM residents: Go to paypal.com/us/webapps/mpp/campaigns/newmexicodisclosure. Learn more at paypal.com/payin4. TRACK YOUR PACKAGES View orders and delivery status until they arrive safely at your door. Not all sellers are participants. MANAGE YOUR SUBSCRIPTION ALL IN ONE APP The easy way to link and track all your subscriptions. ALL YOUR MONEY AND TRANSACTIONS IN ONE PLACE The new Me Tab lets you navigate your money, accounts, and settings right where you’d expect them. PayPal 2211 N 1st St San Jose, CA 95131
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-js
zustand
react-navigation
react-native-reanimated
BUILD KIT DIFFICULTY
Expert
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.
