App Overview

Cornkeeper icon

Cornkeeper

Northbound Software · Sports

Cornkeeper handles cancellation scoring automatically

$0.99

PRICE
$0.99
No 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.

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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.

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

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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.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Cornkeeper handles cancellation scoring automatically. Tap bags in as they land and it totals both teams, cancels the lower score against the higher, and puts only the difference on the board. A bag on the board is one point and a bag in the hole is three. At the end of a round, nine against six scores three for the leader and nothing for the other team. Cornkeeper shows you the net before you commit the round, so you can check it against the boards while everything is still on them. Two ways to play Backyard turns the bust rule on and lets bags be entered freely. Official plays it straight: reach or pass 21, no bust, four bags a team. Switch between them in a tap. Adjust anything underneath and Cornkeeper saves the result as your own custom style. Set your own rules • Play to any score from 11 to 51 • Turn the bust rule on or off, and set the score a bust sends you back to • Enforce four bags a team, or leave bag counts open • Turn the skunk rule on or off at whatever score your group uses The rules, built in A complete cornhole reference travels with the app: how the boards are set up, how a frame is played, what scores and what does not, the fouls, and the house rules people add on top such as bust, skunk and shorter games. Built for the yard • Name each team, or let it go by its color • Undo a finished round, or clear the one in progress • Your game is saved, so closing the app never loses it • Runs on iPhone and iPad, with the teams side by side on a wide screen • No account, no network, no ads, and nothing collected about you

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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
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.