App Overview

tack X Sailing Regatta Timer icon

tack X Sailing Regatta Timer

Paul Wash · Sports

An intuitive, easy to use tactical mobile application for sailors by sailors

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
1.0
1 ratings · Below Average

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 included19 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 tack X Sailing Regatta Timer: 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 a clean, modern design with intuitive navigation.

Assumption to check: Poor user interface and experience

Validate with people who use this workflow before building.

Hypothesis 2

Include comprehensive event tracking and management tools.

Assumption to check: Lack of features for event management

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize timer settings and notifications.

Assumption to check: Limited customization options

Validate with people who use this workflow before building.

Hypothesis 4

Ensure thorough testing and optimization for smoother performance.

Assumption to check: Inconsistent performance and bugs

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

An intuitive, easy to use tactical mobile application for sailors by sailors. Built and optimized for iPhone and Apple Watch. Maximum feedback with minimal user input. Easy to use interfaces with highly visible displays. Distance to line, tactical pre-start data, and a race dial that tracks wind shifts and headers! We are happy to announce that all these features are also available on the Apple Watch. At tack X, our mission is simple. First, we provide sailors clear and concise data in all conditions. Second, we foster the improvement of sailing skills and a lifetime of learning through technology. Not only do we write and test the software for our customers, we use it too. Every member of our team uses tack X. Our continuous field testing process means a better experience for you. Not a racing sailor? Not a problem there are features for you too! Use the nav display for position and course information. Use the "line manager" to calculate distances and times to coordinates. And more! Features for all devices: - Easily readable user interfaces with large, clear fonts optimized for viewing in bright sunlight even with polarized lenses - Time your start to a tenth of a second - Track your distance to the start line - Pre-start course guidance and tactics - Track wind shift lifts and headers - Line length, seconds to run line, seconds to line - Map view - Manual boat and pin input - Signal K for NMEA integration - Apple Health App integration - add to your daily exercise goal while you sail - Night Mode - Diagnostics - And much more ******** DOWNLOAD THE USER GUIDE ******** Available at the developer & support URL. Before leaving a review - please contact us at the support link - we are here to help! We are constantly improving tack X. We have many features planned for upcoming releases. If you have a feature you want to see let us know! *Note that this app uses your location in the background. Using location background mode may dramatically decrease battery life.

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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
Advanced

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.