App Overview

Simple Sailing Countdown Timer icon

Simple Sailing Countdown Timer

DAVID ANTHONY KING · Sports

NO ADVERTISEMENTS

$1.99 · In-app purchases

PRICE
$1.99
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 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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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 Simple Sailing Countdown 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

Introduce customizable countdown settings and alerts.

Assumption to check: Limited features for advanced users

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more intuitive tab structure and easy access to history.

Assumption to check: Poor navigation experience

Validate with people who use this workflow before building.

Hypothesis 3

Add animations and sounds for user interactions.

Assumption to check: Lack of user feedback on actions

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to save and sync their timer history across devices.

Assumption to check: No option for cloud storage of timer history

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

NO ADVERTISEMENTS Simple Sailing Countdown Timer helps race organisers and individual sailors start every race perfectly by counting down the time out loud. Also suitable for any other sport or occasion when an accurate countdown to the start is required. Set your preferred start sequence with one tap, choose from common countdown intervals, and get clear visual and audible cues right through to the final horn. Designed with simplicity and precision in mind, this timer is easy to read even in bright sunlight and offers the reliability needed on the water. Whether you are an organiser or an individual racing remote controlled yachts, dinghies or yachts, Simple Sailing Countdown Timer ensures that you can organise a race or hit the start line perfectly at the beginning of every race. Features * Quick-set race start intervals (10:00, 5:00, 3:00, 2:00, 1:00) * Large, high-contrast display * Spoken prompts every minute and then every 10 seconds during the final minute * Audible tick for every second in final minute * Spoken countdown for final 10 seconds * Audible air-horn sound at zero seconds * Adjustable horn volume * Clean, distraction-free interface Simple. Accurate. Audible. Gets you off to a perfect start. PLEASE NOTE: Sound on Apple Watch requires either a paired Bluetooth speaker/headphones, or an Apple Watch model that supports media playback through the built-in speaker. Apple Watch SE models may require Bluetooth audio.

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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
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.