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.
WHY MUSIC MATTERS: Music isn’t just background noise — it’s a performance enhancer.
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 Fit Radio: Train Inspired: map the core Music 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.
WHY MUSIC MATTERS: Music isn’t just background noise — it’s a performance enhancer. The right playlist can motivate your members, boost your energy, and transform any workout from routine to powerful. It sets the tone, drives intensity, and helps you push through when it counts. FITRADIO delivers nonstop, DJ-curated mixes designed to make you move — whether you're training solo, leading a fitness class, or creating an energetic vibe for your gym. Trusted by fitness professionals, coaches, and top studios across the country, FITRADIO helps everyone — from beginners to pros — stay focused, fired up, and coming back for more. HOW OUR DJS MAKE THE MUSIC FITRADIO mixes aren’t random playlists — they’re professionally crafted by real DJs using the music you already know and love. • Popular music, remixed with purpose — top hits, underground gems, and timeless favorites • No skips, no lulls — just seamless, high-energy flow • Real DJs who understand momentum, energy, and workout pacing • Mixes built with purpose — from warm-up to cooldown WHY GYMS & TRAINERS CHOOSE FITRADIO We don’t just make workout music — we build it with the best in fitness. • Built with industry leaders like Orangetheory, Burn Boot Camp, F45, and more • Music for every class format: HIIT, crosstraining, Spin, boxing, yoga, Pilates, barre, and beyond • Stations for every gym zone: warm-up, fitness class, gym floor, locker room • Browse by class type, genre, BPM, or mood • Hit play and go — every mix is ready to energize the room • Multi-genre blends to keep every member engaged • Consistent, high-quality member experience across all locations • FITRADIO PRO can be used for group fitness — unlike most music apps. Just make sure you're using the PRO tier. • We handle the music — you lead the class WHY INDIVIDUALS CHOOSE FITRADIO Music is your most powerful workout tool — and FITRADIO is built to maximize it. • The right beat wakes you up, excites you, and drives your performance • Stations for every workout, mood, and genre — from HIIT to yoga • Audio-guided workouts with expert coaching and music • Progressive workout programs for every fitness level • Tempo-matched mixes for runners to keep rhythm and pace • Used by elite trainers and studios across the country • Give it one workout and you'll never go back to the same old playlist READY TO TRANSFORM YOUR WORKOUT? DOWNLOAD FITRADIO AND PRESS PLAY. AVAILABLE ON APPLE WATCH Take your music with you and leave your phone behind. • Run free with FITRADIO on Apple Watch • Listen to your favorite mixes on the go • FITRADIO integrates with HealthKit and helps close your activity rings SUBSCRIPTION INFORMATION • Title of Service: Fit Radio Premium • Length of Subscription: 1 Month • Subscription Options: Monthly, Quarterly, or Yearly • Payment will be charged to your iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period • Your account will be charged for renewal within 24 hours prior to the end of the current period • Subscriptions may be managed by the user, and auto-renewal can be turned off in Account Settings after purchase • No cancellation of the current subscription is allowed during the active period • Any unused portion of a free trial, if offered, will be forfeited when the user purchases a subscription FitRadio shares workout data with HealthKit and helps close activity rings on Apple Watch. Listen to all your favorite mixes on the Apple Watch App. FOR MORE INFORMATION: Privacy Policy: http://www.fitradio.com/privacy/ Terms of Use: http://www.fitradio.com/tos/
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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 offline access to playlists
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent audio playback quality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficulty in finding specific playlists
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited social sharing options
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.