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
BarzLoaded
BarzLoaded is intended for use in gyms and at Powerlifting meets
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
4 ratings · Top 30%
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 included15 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 BarzLoaded: map the core Sports 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 more sports and customizable performance metrics.
Assumption to check: Limited sports and performance tracking options
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and layout with clear icons.
Assumption to check: Difficult navigation in a crowded UI
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more intuitive subscription management interface.
Assumption to check: Subscription management is not user-friendly
Validate with people who use this workflow before building.
Hypothesis 4
Introduce forums or social features for user interaction.
Assumption to check: Lack of community features for users
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
BarzLoaded is intended for use in gyms and at Powerlifting meets. Dial in the weight and BarzLoaded displays the plates to load on each end of the bar, and the weight converted from pounds to kilos. BarzLoaded can also display the Wilks, Schwartz and Malone scores for a meet total for an Open lifter of an entered bodyweight and gender, allowing the strongest lifter across weight classes to be quickly identified. Meet officials, spotters & loaders, and spectators can use BarzLoaded at Powerlifting and Weightlifting meets to reduce the chance of a misloaded bar, and speed the loading and scoring processes. Coaches and meet expeditors can use BarzLoaded to quickly convert attempts from pounds to kilos, and identify the weight a lifter needs to attempt to be strongest overall lifter.
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
react-native-svg
react-hook-form
BUILD KIT DIFFICULTY
Starter
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.
