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
Profitl
Profitl determines the best FBA deals wherever you are - in-store or online - through two solutions for one monthly price
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.8
9 ratings · Below Average
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/
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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 Profitl: map the core Shopping 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
Incorporate advanced search and filtering options.
Assumption to check: Limited product discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Enhance user experience and performance.
Assumption to check: Poor user ratings
Validate with people who use this workflow before building.
Hypothesis 3
Add order tracking with push notifications.
Assumption to check: No order tracking functionality
Validate with people who use this workflow before building.
Hypothesis 4
Implement a recommendation engine based on user preferences.
Assumption to check: Lack of personalized recommendations
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
Profitl determines the best FBA deals wherever you are - in-store or online - through two solutions for one monthly price. Scan any item and analyse the data in a split second. How your time is worth more with Profitl? Profitl breaks down a product's profitability in front of your eyes. Find your next winning product on any website at any time with our brilliant features. Estimated monthly sales figures - based on product performance statistics pulled straight from Amazon you can see how frequently a product sells. Estimated FBA and referral fees - giving you a clear insight into the fees you’ll be paying Amazon. VAT, break even, return on investment and profit per unit estimates - so you can understand a product's potential profitability. Product reviews - helping you to gauge past buyer's reception to a product. Product price graphs - with 90, 180 and 365 day graphs you can compare past pricing to determine the most and least you could sell a product for. Seller Data - see at a glance how many FBA and FBM sellers are selling a product, including Amazon themselves. Live Stock data - you can easily see how many units your competitors have so you can plan your strategy. Lowest offer section - showing you the competition's current pricing. IP Risk - so you can be aware of any potential warnings which could affect you and your FBA business. HAZMAT status - helping you identify whether Amazon classifies the product as hazardous. Potentially oversized status - this warning prevents you from being affected by high FBA and delivery fees. Advanced Historical Data - with a huge amount of historical data points, you can determine average prices, competition and sales. eBay Data - diversify your streams of income and check both the average new and used prices on eBay. Notes section - don't risk forgetting your thoughts on a product. With the notes section you can comment on the products you have analysed. Personal rating - rate your products so you can quickly find a product and don't have to repeat your analysis. Save deal - save your notes, ratings and reviews in one click. You can come back to a product at any time in the "Saved Scans' section on the Profitl Website. Terms of Use: https://profitl.app/terms Privacy Policy: https://profitl.app/privacy
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
Zustand
Axios
React Navigation
BUILD KIT DIFFICULTY
Advanced
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.
