App Overview

CalcuttaButter icon

CalcuttaButter

Joseph Dwyer · Sports

Revolutionize Your Calcutta Auctions – Faster, Smarter, and More Fun!

$5.99 · In-app purchases

PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
1 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.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for CalcuttaButter: 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

Implement in-app messaging and push notifications to enhance user interaction.

Assumption to check: Limited user engagement features like chat or notifications

Validate with people who use this workflow before building.

Hypothesis 2

Add advanced filtering and recommendation algorithms for matches and teams.

Assumption to check: Difficulty in finding matches or teams to join

Validate with people who use this workflow before building.

Hypothesis 3

Create an interactive onboarding experience to guide users through app features.

Assumption to check: Poor onboarding process for new users

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize team logos, match rules, and settings.

Assumption to check: Limited customization options for teams and matches

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

Revolutionize Your Calcutta Auctions – Faster, Smarter, and More Fun! Tired of slow, chaotic traditional Calcutta auctions that drag on for hours? Here is the ultimate mobile app for managing Calcutta auctions in pool (billiards), golf, tennis, darts, pickleball, and more! Whether you're hosting a local 8-ball tournament, a weekend golf scramble, a pickleball mixer, or a darts league night, this app saves hosts and players valuable time and money while delivering an exciting, fair, and efficient experience. How It Works – Simple & Seamless: 1 - Host Setup — The auction host creates the event in seconds right on their phone or tablet. 2 - Host adds players/teams, venues, set auction rules, payout structure, and any custom options. 3 - Players Join — Players enter a simple auction code on their own phones to join. 4 - Simultaneous Bidding - Everyone bids at the same time—no more waiting for bids! Watch bids rise in real-time for lightning-fast auctions that keep the energy high. 5 - Secure & Easy Payments — Once bidding ends, the host collects funds from winners quickly and hassle-free. 6 - Post-Tournament Payouts — After the event, the host inputs results (winners, places, etc.). The app instantly calculates and displays exact payouts for each bidder based on your predefined rules—eliminating math errors and disputes. Key Features & Benefits: Supports pool players, golfers, tennis players, darts enthusiasts, pickleball players, and any multi-player tournament format Simultaneous real-time bidding — auctions finish in a fraction of the time Mobile-first design — works great on phones and tablets for hosts and bidders Customizable rules — define payout percentages (e.g., 1st place 50%, 2nd 20%, etc.), buybacks, side pots, or special bonuses Secure auction codes — keep events private or open to groups Automatic calculations — no spreadsheets needed for payouts Saves time & reduces errors — more fun, less hassle for everyone Perfect for leagues, charity events, club nights, or casual get-togethers. Turn your next tournament into an unforgettable experience with fair, transparent, and thrilling Calcutta action. Download now and make your next Calcutta auction the best one yet! Ready to bid smarter? Get the app today! This version highlights the core innovation (simultaneous bidding on mobile), targets your specific sports audience, emphasizes time/money savings, and uses energetic language to appeal to competitive players and hosts. If you have a specific app name, additional features (e.g., payment integration, leaderboards, history saving), or payout examples, let me know to refine it further!

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 Navigation
react-native-paper
BUILD KIT DIFFICULTY
Intermediate

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.