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
Lift Card - Social Fitness App
Lift smarter
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
552 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 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 Lift Card - Social Fitness App: 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
Introduce customizable workout templates and routines.
Assumption to check: Limited workout customization options
Validate with people who use this workflow before building.
Hypothesis 2
Add gamified challenges and leaderboards to boost engagement.
Assumption to check: Social features are not very engaging
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the user interface and prioritize the most used features.
Assumption to check: The app can feel cluttered with too many features
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with HealthKit and Google Fit for better tracking.
Assumption to check: Lack of integration with health tracking devices
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
Lift smarter. Train harder. Stay consistent. Lift Card brings you closer to your fitness goals with an easy way to log workouts, track progress, and connect with a community that keeps you motivated. Whether you’re in the gym or training at home, Lift Card makes every rep count. Key Features: - Log Your Workouts: Track sets, reps, and weights for every exercise. Watch your strength and endurance grow over time. - Visualize Progress: See your gains with detailed charts that keep you motivated to hit new PRs. - Connect With Lifters: Join a community of fitness enthusiasts, share progress, and get inspired by others on their journey. - Discover & Share: Explore workout ideas and celebrate achievements on the Discover Page. - Completely Free: No subscriptions or paywalls. All features available to help you stay consistent. From your first lift to your biggest milestone, Lift Card is your all-in-one companion for fitness progress and community motivation. Start tracking. Start lifting. Start improving.
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
Supabase
react-navigation
react-native-reanimated
@supabase/supabase-js
BUILD KIT DIFFICULTY
Intermediate
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.
