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.
Liftoff is the best workout tracker app that ranks your gym performance
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Liftoff - Ranked Gym Workouts: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Liftoff is the best workout tracker app that ranks your gym performance. Get feedback on 600+ exercises, track progress, and compete with friends. Download the #1 gym rank app & join over 4 million lifters today! Gamified Workout Tracker | Ranks | Streaks | Accountability | Logger Boost Your Fitness Journey with Liftoff app Connect and Compete Join a vibrant community of fitness enthusiasts who make every workout count. Liftoff is a social platform where you can connect, compete, and share your fitness journey with friends and other gym-goers. - Community Engagement: Dive into a fitness community that motivates and inspires. Follow friends, exchange tips, and celebrate each other’s successes. - Global Leaderboards: See how you stack up against the world. Participate in community challenges and climb the leaderboards by staying active and consistent. Track and Progress With Liftoff, monitoring your fitness progress has never been easier and more enjoyable. Use advanced visualizations and get detailed insights into your workouts and overall fitness evolution. - Comprehensive Tracking: Log workouts seamlessly, noting every exercise, set, and rep. Experience the joy of tracking with our intuitive interface. - Progress Visualization: Watch your progress unfold with detailed charts and bodygraphs. Understand your strengths and areas for improvement at a glance. Daily Deals and Rewards Stay motivated with daily deals and exclusive bundles available in the Liftoff Shop. Earn rewards by completing daily and weekly quests. - Earn and Spend: Collect eggs through workouts and challenges. Use them to unlock exciting rewards like new cosmetics, gear, and workout plans. - Exclusive Offers: Access daily deals and special bundles that make your fitness journey rewarding Customization at Your Fingertips Personalize your workout experience with custom exercises and adjustable presets. Tailor everything to fit your needs, from workout duration to intensity, ensuring a truly personalized fitness routine. - Custom Exercises: Add your exercises with custom images and descriptions, making your workouts yours. - Adaptive Workouts: Adjust presets and routines on the fly based on your current fitness level and goals. Engagement and Motivation Liftoff makes your fitness journey exciting with ranks, streaks, quests, and achievements, keeping you motivated every step of the way. - Invite & Earn Together: Bring friends along for the ride! Earn rewards when friends join through your invite. - Share Your Wins: Show off your progress and achievements with easy, stylish social sharing, inspiring others and keeping your motivation high. Designed for All Whether you're a beginner or a seasoned athlete, Liftoff caters to all. With support for various types of exercise tracking—from weightlifting to cardio—every workout counts. - Inclusive Fitness: Track all types of workouts, including strength training, cardio sessions, and more. - Accessibility Features: Enjoy a user-friendly interface with accessibility options to ensure everyone can join the Liftoff community. Support and Updates Constantly evolving, Liftoff is committed to improving your experience with regular updates and quality-of-life changes. Our support team is always ready to assist you in your fitness journey. - Regular Updates: Stay on top of the latest features and enhancements. We continually refine Liftoff based on user feedback. - Dedicated Support: Encounter an issue or have a suggestion? Our responsive support team is here to help you keep your workouts on track. Join Liftoff Today Ready to elevate your fitness game? Download Liftoff now and transform the way you exercise. Become part of a community that’s as passionate about fitness as you are! Privacy Policy: https://info.liftoffrank.com/en/privacy Terms of Service: https://info.liftoffrank.com/en/terms
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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
Assumption to check: Limited workout customization options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase limitations after free trial
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Insufficient progress tracking
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.