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
earnify
Earn loyalty reward points on every purchase, at the pump and in-store, with earnify™! Newly registered users are eligible for a 250-point welcome offer that can be redeemed for exciting rewards! Please note that poin...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
85,247 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 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 earnify: map the core Navigation 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 offline maps and caching for gas stations.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Offer an ad-free subscription tier.
Assumption to check: In-app ads can be intrusive
Validate with people who use this workflow before building.
Hypothesis 3
Enhance rewards visibility and tracking.
Assumption to check: Limited rewards program details
Validate with people who use this workflow before building.
Hypothesis 4
Optimize API calls and loading indicators.
Assumption to check: Slow loading times for gas station data
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
Earn loyalty reward points on every purchase, at the pump and in-store, with earnify™! Newly registered users are eligible for a 250-point welcome offer that can be redeemed for exciting rewards! Please note that points might take up to 24 hours to appear. earnify™ is available at participating bp, Amoco, and ampm gas station and convenience stores. With the earnify™ app, you’ll save on app only deals and get rewarded with incredible Bonus Deals on your favorite stuff. earnify™ members can enjoy the following perks: - Welcome offer of 250 points - Instant 5¢ savings on every gallon - Earn 1 point per dollar spent on fuel - Earn 2 points per dollar spent on convenience - Redeem for gas rewards at the pump or on in-store purchases. earnify™ also provides convenience store rewards and savings on snacks, drinks, and other items purchased at participating convenience stores. Other earnify™ app features: - Easily register in just seconds by using your phone number and email address - Save time with an enhanced fuel payment experience - Store payment cards securely for convenient access - Save fuel receipts automatically by going paperless - Find the nearest participating sites using the site locator - Enjoy additional fuel savings and convenience store rewards Access ongoing gas rewards, special convenience offers, discounts, and more with earnify™, available now at participating bp, Amoco, and ampm gas stations and convenience stores. Are you a bp rewards Visa cardholder? Earn even more and gain access to special offers, gas discounts, and gas rewards with 30¢ savings on every gallon in the first 60 days after account opening, then 15¢ off per gallon thereafter at bp and Amoco gas stations only, with no annual fee. Earn 5% cashback on your non-fuel purchases at bp and Amoco gas stations and convenience stores, 3% on groceries and dining, and 1% on all other qualifying purchases! Link your card to the earnify™ app and swipe at the pump to start saving. You can also enjoy the convenience of contactless payments within the app. Terms & conditions apply: https://www.bp.com/en_us/united-states/home/terms-and-conditions.html#tab_credit-cards
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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
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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.
