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
BiteByBite - Calorie Counter
Finally, a calorie tracker that respects your wallet
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 BiteByBite - Calorie Counter: 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 a barcode scanner for quick food logging.
Assumption to check: Users find it tedious to log food entries manually
Validate with people who use this workflow before building.
Hypothesis 2
Integrate with external food databases for a richer experience.
Assumption to check: Limited food database can hinder user experience
Validate with people who use this workflow before building.
Hypothesis 3
Provide nutritional details per food item, including macros.
Assumption to check: Some users desire more detailed nutritional breakdowns
Validate with people who use this workflow before building.
Hypothesis 4
Simplify subscription options and provide clearer benefits.
Assumption to check: Subscription management can be confusing
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
Finally, a calorie tracker that respects your wallet. BiteByBite is a beautifully simple but effective calorie counter designed for people who want to track their health journey without expensive subscription apps. PAY ONCE, USE FOREVER: Just $0.99 - no monthly fees, no annual subscriptions, no premium tiers. Every feature is unlocked from day one. Your data stays on your device. Start your health journey today for less than a cup of coffee. WHAT YOU CAN TRACK: • Calories - Log meals with customizable sections (Breakfast, Lunch, Dinner, Snacks, or create your own section such as weight lifting supplements, medicine or vitamins) • Macros - Track protein, carbs, and fat with daily goals • Weight - Monitor your progress with a visual weight history • Body Measurements - Track biceps, chest, waist, hips, thighs, and calves • Water Intake - Stay hydrated with a simple glass counter • Exercise - Log workouts and see calories burned added to your daily budget • Meal Moods - Record how you feel after eating (satisfied, energized, bloated, etc.) • Daily Notes - Jot down thoughts about your day • Monthly Dashboard - See your entire month at a glance with color-coded calorie rings. Long press on a date in the month and see an overview of the tracked calories, water, macros, notes, moods on the same page for that day. Quickly identify patterns with weekly summaries showing days under or over your target. SMART FEATURES: • Quick-add from recent foods • Barcode scanner for easy logging • BMR calculator with weight loss pace options
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
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BUILD KIT DIFFICULTY
Starter
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.
