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
Weight Tracker – DailyWeight
Achieve your dream weight – effortlessly!
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
8 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.
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/
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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 Weight Tracker – DailyWeight: 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 more interactive and detailed charts.
Assumption to check: Users often find it hard to visualize weight trends over time
Validate with people who use this workflow before building.
Hypothesis 2
Add social features for sharing progress and challenges.
Assumption to check: Limited features for community engagement
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations of premium features at the point of purchase.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with HealthKit or Google Fit for automatic weight tracking.
Assumption to check: Lacks integration with health data sources
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
Achieve your dream weight – effortlessly! DailyWeight is the simplest way to log your weight and track your progress. Whether you want to lose, gain, or maintain your weight, DailyWeight is here to support you every step of the way! Here’s how it works: 1. Open DailyWeight. 2. Enter your current weight using the scroll wheel. 3. Check your progress and curve chart. 4. Done! DailyWeight saves your entries automatically – no hassle, no distractions. Why choose DailyWeight? - Easy to use: Enter your weight with a quick scroll – it’s that simple. - All-in-one dashboard: Track your progress, BMI, start, and target weight. - Motivational curve chart: Visualize your journey to your goal weight. - Full flexibility: Add, edit, or delete entries anytime. - Clear overview: View your weight history in a table with daily differences and stats. - CSV export: Perfect for spreadsheets or sharing your data. - Supports Apple Watch and Widgets - Ad-free experience: Stay focused on your goals. Your perfect companion for weight loss or gain: With DailyWeight, you’re always in control of your weight journey – every step of the way to your dream weight. Download now and get started!
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
Victory Native
Axios
React Navigation
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.
