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
Paddlr
Paddlr is a workout app designed for paddle sports enthusiasts.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.3
3 ratings · Below Average
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
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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/
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 Paddlr: 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
Add customizable workout types and templates.
Assumption to check: Limited workout types available
Validate with people who use this workflow before building.
Hypothesis 2
Integrate social challenges and sharing options.
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
Hypothesis 3
Ensure a consistent design language across all screens.
Assumption to check: Inconsistent user interface elements
Validate with people who use this workflow before building.
Hypothesis 4
Prioritize quality assurance and user feedback to improve stability.
Assumption to check: Low rating due to bugs
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
Paddlr is a workout app designed for paddle sports enthusiasts. Record your paddle sessions while keeping track of stroke count (SPM available only on Apple Watch for kayak and crew paddle type), distance, elapsed time, pace and map route. Paddle sessions captured on watch will sync to iPhone so your entire history is available even when leaving your iPhone ashore. Features include: • With opt-in Health integration, paddle workouts contribute to your daily Activity Rings! • Track your paddle route on iPhone with pace color-coded maps. Drop flags to mark points of interest. • Compatible with Strava! Automatically upload new paddle activities to your Strava feed. • Export routes to GPX (Garmin's open file format) for upload to other mapping / GPS services. • Monitor kayak and crew stroke count and cadence on Apple Watch. Save workout to view interactive cadence charts. • Active compass with bearing on Apple Watch. • Interactive heart rate charts for workouts on Apple Watch. • Receive in-workout minimum stroke cadence alerts on Apple Watch. • Sync with iCloud so saved paddle workouts are available across all your devices. • Get a quick glance at current and hourly weather conditions including wind speed, direction, and gusts. Reports provided by Apple Weather. • Coming soon! Distance per stroke data points and charting. Give it a try! We promise to keep the app updated with new features and improvements all driven by the paddle sport community. Please submit a review with any issues, comments and feature requests so we can respond and provide you the best experience using Paddlr. Happy paddling!
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
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.
