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
Nutron: Food Scanner
Nutron helps you make healthier food choices in seconds
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
870 ratings · Top 15%
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 included17 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 Nutron: Food Scanner: map the core Health & Fitness 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 advanced image recognition and AI for better accuracy.
Assumption to check: Users find food scanning accuracy inconsistent.
Validate with people who use this workflow before building.
Hypothesis 2
Expand database with user contributions and partnerships.
Assumption to check: Limited nutritional database for certain foods.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a more subtle subscription model with value highlights.
Assumption to check: In-app purchase prompts can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 4
Add HealthKit/Google Fit integration for comprehensive tracking.
Assumption to check: Lack of integration with fitness tracking apps.
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
Nutron helps you make healthier food choices in seconds. Simply scan any product barcode to instantly get a detailed health analysis. HEALTH SCORE 0-100 Every product receives a clear score based on: • Nutritional quality (Nutri-Score) • Additives and their risk levels • Processing level (NOVA classification) • Organic certifications DETAILED ANALYSIS • Complete nutrition facts with color-coded ratings • Explanation of why each nutrient is good or bad for you • Full list of additives with risk assessment • Allergen warnings • Labels and certifications SMART FEATURES • Browse top-rated products by category • Save your favorite products • Track your scanning history • Get personalized recommendations based on your scans CATEGORIES Discover the healthiest options in Water, Protein Bars, Yogurt, Cereals, Juices, Energy Drinks, and more. Powered by Open Food Facts, the world's largest open food database with 3M+ products. Eat better. Live better. Download Nutron today. — NUTRON PRO SUBSCRIPTION Nutron Pro unlocks unlimited scans, detailed health scores, personalized recommendations, and an ad-free experience. • Payment will be charged to your Apple ID account at confirmation of purchase • Subscription automatically renews unless canceled at least 24 hours before the end of the current period • Your account will be charged for renewal within 24 hours prior to the end of the current period • You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase • Any unused portion of a free trial period will be forfeited when you purchase a subscription Nutron is an informational tool. Content is not medical advice and does not replace guidance from a qualified healthcare professional. Ingredient assessments reflect our research methodology and may not reflect current regulatory status Terms of Use: https://vine-handbell-fcf.notion.site/TOS-Nutron-31eacc00bc9080fc9527df29d820072b?pvs=74 Privacy Policy: https://vine-handbell-fcf.notion.site/Privacy-policy-Nutron-302acc00bc90801897aff349770e23a0
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
Expo
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expo-camera
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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.
