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
Daily Burn: Workout Coach
Daily Burn is the at-home workout app with Daily Burn Coaching—so you always know what to do next.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
14,220 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.
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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'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 Daily Burn: Workout Coach: 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
Offer more free content to engage users.
Assumption to check: Limited free features compared to premium
Validate with people who use this workflow before building.
Hypothesis 2
Use AI to tailor workouts based on user preferences.
Assumption to check: Lack of personalization in workout recommendations
Validate with people who use this workflow before building.
Hypothesis 3
Simplify UI and enhance navigation flow.
Assumption to check: Difficult navigation in crowded screens
Validate with people who use this workflow before building.
Hypothesis 4
Improve backend reliability for real-time data updates.
Assumption to check: Inconsistent data syncing across 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
Daily Burn is the at-home workout app with Daily Burn Coaching—so you always know what to do next. DAILY BURN COACHING (1:1 SUPPORT) Get more than workouts. Get guidance. · A personalized plan built around your goals, fitness level, and preferences · Message your coach in-app for real-time support, accountability, and expert advice · Share progress and get feedback with text, audio, photos, and video WORKOUTS FOR EVERY GOAL Choose from thousands of audio + video workouts, including: · Strength training, dumbbell workouts, cardio, HIIT · Yoga, Pilates, mobility, stretching, meditation · Dance, postnatal, and more Have 10 minutes? 30? 60? There’s always something that fits your schedule. DAILY BURN 365 — NEW CLASS EVERY WEEKDAY Don’t feel like choosing? Stream Daily Burn 365 and join the community chat during and after every session (weekdays at 9am ET). STAY MOTIVATED WITH COMMUNITY Connect with members and trainers through live chat and in-app messaging to celebrate wins, ask questions, and stay inspired. STREAM ANYWHERE Access Daily Burn on iPhone, iPad, desktop, or laptop. Cast to your TV using Apple TV, Roku, Amazon Fire, or stream via AirPlay. Sync with Apple Health (iPhone and iPod touch only) and share activity with Apple Watch, Fitbit, and more. Daily Burn isn’t just a fitness app—it’s coaching, workouts, and a community that grows with you. SUBSCRIPTION INFO Cancel anytime in your iTunes account settings. Subscription automatically renews unless canceled at least 24 hours before the end of the current period.
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.
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BUILD KIT DIFFICULTY
Expert
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.
