App Overview

MOA RangeR icon

MOA RangeR

ARKADIUSZ PATRYK ŁAPAJSKI · Sports

Want to improve your accuracy? Calculate MOA for your shots and monitor your shooting results

$3.99 · In-app purchases

PRICE
$3.99
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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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/
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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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for MOA RangeR: 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

Focus on gathering user feedback to improve features.

Assumption to check: Limited user feedback and reviews

Validate with people who use this workflow before building.

Hypothesis 2

Add options for users to share stats or compete with friends.

Assumption to check: Potential lack of social features

Validate with people who use this workflow before building.

Hypothesis 3

Provide clear value for premium features to encourage sign-ups.

Assumption to check: Subscription fatigue

Validate with people who use this workflow before building.

Hypothesis 4

Implement a guided onboarding process to help new users.

Assumption to check: User onboarding confusion

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

Want to improve your accuracy? Calculate MOA for your shots and monitor your shooting results. Shoot better and better groups. The MOA RangeR application will calculate the minute of angle (MOA) for your shots – based on the photo of the bullet holes. How does it work? 1. Select the measurement system (metric or imperial). 2. Upload a picture of the target with bullet holes or take a photo directly in the application. 3. Measure the point of reference on the target (any fragment, enter the actual dimension for scale). 4. Set the range distance (your distance to the target). 5. Select the bullet holes you want to check and mark them. 6. The MOA value will be calculated automatically. The ballistic calculator works on any shooting range length and any target size – just enter the size of the reference. This is a simple and quick way to automatically measure MOA. You can choose from 2 drawing modes: > precision (default) – you set parameters using the arrow and button, > touch (experimental) – you set parameters using gestures. Additionally, you can easily select and change the indicator colors so that they are always visible (regardless of the shooting target color). With the MOA RangeR calculator, you will: — know the MOA with an accuracy of 2 decimal places, — save time on calculating MOA yourself, — know your shooting precision, — check and improve your shooting skills. This grouping app will be updated with new functionalities – in the future, there will be features such as: > average hit point, > multiple groups, > rifle scope zeroing assistant, > sharing photos (e.g., on social media), > saving photos, > statistics with a list of previous MOA results. For your comfort, the app does not collect any data. No more manual MOA calculations! Check your group size easily. Choose a calculator created by a shooting sport enthusiast – for shooters who like practical solutions, e.g. precision rifle shooters.

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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.

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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.