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
iDrink4Free - Bar Tricks and Bets for Free Drinks
The Original Bar Trick / Bar Bet App to hit the Apple App Store
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included18 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 iDrink4Free - Bar Tricks and Bets for Free Drinks: map the core Food & Drink 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
Incorporate user-generated content for more diverse tricks.
Assumption to check: Limited variety of tricks and bets available
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing options and user profiles to foster community.
Assumption to check: Lack of social features to share bets or tricks
Validate with people who use this workflow before building.
Hypothesis 3
Offer a freemium model with more free features to entice users.
Assumption to check: In-app purchases may limit access to certain features
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI and enhance navigation for better user experience.
Assumption to check: User interface may feel cluttered
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
The Original Bar Trick / Bar Bet App to hit the Apple App Store ★★★★ We've added HD VIDEOS! ★★★★ iDrink4Free is a compilation of bar tricks and bets which are guaranteed to amaze your friends and have them buying YOU drinks all night long. ★ This app will pay for itself the very first time you use it! ★ ✔ NOW WITH 37 BAR BETS! ✔ 27 of the tricks have HD videos to show you exactly how to perform them! ✔ All Videos are stored within the app! ✔ No Internet connection is required to play the videos! ✔ Plot successful points with comments on our collaborative GPS map! ✔ Full Multitasking ability. ✔ Use the Random feature to quickly find a quick trick! We will continue to add new videos in future updates. The Map feature and Twitter link will always need a connection to the Internet to pull live data. We do not use your location for anything else. Check your Location Services within Settings-General-Location Services, and turn it on if it is not working. Please remember to update your reviews for the new version and to provide feedback. Email us from the link on our web site. We will personally respond to every email in a timely manner. Keep up to date with news by following iDrink4Free on Twitter.
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
zustand
react-native-reanimated
expo-router
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.
