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
Calories Club: AI Food Tracker
Log any meal in under 5 seconds - just snap a photo, speak, or scan a barcode
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
6 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 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 Calories Club: AI Food Tracker: map the core Food & Drink 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 AI food recognition to automate meal logging.
Assumption to check: Users find it tedious to log meals manually.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance insights with personalized reports based on user habits.
Assumption to check: Limited insights into nutritional data.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations and trial options for subscriptions.
Assumption to check: Subscription plans may confuse users.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social sharing and community challenges to engage users.
Assumption to check: Lack of community features for 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
Log any meal in under 5 seconds - just snap a photo, speak, or scan a barcode. Calories Club uses AI to count calories and macros instantly, so you never have to search a food database again. Hate counting calories? So did we. That's why we built the simplest calorie counter and food diary that actually works. Tell it what you ate like you'd tell a friend - and AI handles the rest. HOW IT WORKS - Snap a Photo - AI recognizes your meal and estimates calories and macros - Scan a Barcode - get precise nutrition data from millions of packaged foods - Just Type or Speak - say "I had a turkey sandwich for lunch" in chat and get instant tracking - AI Chat - log meals, ask questions, and get nutrition advice all in one conversation CHOOSE YOUR AI COACH Pick a personality that fits your style: - The Pro - data-driven, clinical insights for peak performance - The Buddy - warm, supportive encouragement for stress-free habits - The Savage - witty, no-sugarcoating tough love for your food choices - Or create your own custom AI personality (Pro) WHAT YOU GET - Calories and macronutrients (protein, carbs, fats) for every meal - Daily and weekly calorie trends with beautiful charts - Built-in weight tracker to follow your progress over time - Water intake tracking alongside your food log - AI-powered insights that spot patterns in your eating habits - Shareable daily recap images - beautiful AI-generated food art from your meals - Share your progress on Instagram Stories and X with one tap - Ask AI questions like "How many calories did I eat yesterday?" - Email reports with AI analysis of your food habits and progress - Automatic meal categorization (breakfast, lunch, dinner, snack) SWITCHING FROM ANOTHER APP? Coming from MyFitnessPal, Yazio, Lose It!, FatSecret, or Lifesum? Calories Club replaces manual food database searches with AI that recognizes what you eat - by photo, voice, or barcode. No typing, no scrolling, no guessing portion sizes. WHY PEOPLE SWITCH TO CALORIES CLUB - No more searching food databases - AI recognizes thousands of foods automatically - Log meals in seconds, not minutes - just chat like you'd text a friend - AI spots trends you'd miss - like late-night snacking patterns or protein gaps - Beautiful shareable recaps make tracking feel rewarding - Works offline - record entries anywhere, sync when connected - Your photos and voice recordings stay on your device - No ads, no data selling, GDPR compliant Free to start. Download Calories Club and see why calorie counting doesn't have to be hard. Note: Calories Club uses AI for food recognition. Results are estimates and should not replace professional medical or nutritional advice. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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.
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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.
