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
Cycle Now!
Track your indoor cycling workouts with real-time power zones
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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
Make this idea yours
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 included16 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 Cycle Now!: 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
Integrate social sharing and challenges.
Assumption to check: Lack of community features for motivation
Validate with people who use this workflow before building.
Hypothesis 2
Enhance integration with HealthKit and Strava.
Assumption to check: Limited integration with fitness trackers
Validate with people who use this workflow before building.
Hypothesis 3
Offer personalized cycling plans based on user data.
Assumption to check: No customizable workout plans
Validate with people who use this workflow before building.
Hypothesis 4
Introduce advanced analytics and insights.
Assumption to check: Basic metrics tracking
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
Track your indoor cycling workouts with real-time power zones. Connect to your Schwinn IC4, Bowflex C6, or any Bluetooth FTMS bike and see exactly where you're training. Features: • Live Power Zones — 7-zone Coggan model based on your FTP • Smart Smoothing — 3-second and 20-second power averages cut through noise • Lap Tracking — Mark intervals and see per-lap stats • Zone Targeting — Audio and haptic alerts keep you in Z2 or Z5 • Power Graph — Watch your effort unfold in real-time • Workout History — Review past rides with full lap breakdowns Simple by design: No account. No subscription. No cloud sync. Just you, your bike, and your data—stored locally on your device. Dark interface optimized for quick glances mid-workout. Bikes supporting Bluetooth FTMS include the Renpho AI Smart Bike, Joroto X4S, XTERRA SB4500, Schwinn IC4/Bowflex C6, Echelon EX5/EX5S, Matrix ICR50, Diamondback 1260Sc, Keiser M3i, Spirit Fitness XBU55/XBR55, 3G Cardio Elite RB X, Zwift Ride, Wahoo KICKR Bike Pro/Shift, Wattbike Atom/Proton, Saris H3, and JetBlack VICTORY.
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
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@supabase/supabase-js
react-native-gesture-handler
BUILD KIT DIFFICULTY
Advanced
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.
