App Overview

Regatta Starter icon

Regatta Starter

Sebastian Johansson Teknikkonsult AB · Sports

Set two starting line points and a start time and you are ready to race!

$1.99 · In-app purchases

PRICE
$1.99
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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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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What's included16 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 Regatta Starter: 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

Integrate social sharing and community-driven features.

Assumption to check: Limited user engagement and retention due to lack of community features

Validate with people who use this workflow before building.

Hypothesis 2

Implement advanced scheduling algorithms to avoid conflicts.

Assumption to check: Difficulty in scheduling events with conflicting dates

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize themes and layouts for their events.

Assumption to check: Limited customization for event details

Validate with people who use this workflow before building.

Hypothesis 4

Add notifications and reminders for upcoming regattas.

Assumption to check: Poor visibility for upcoming events

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

Set two starting line points and a start time and you are ready to race! Main Features: - Time Remaining display - Distance and Optimal Speed to the Starting Line - Estimated line crossing time Simple buy once model. No in-app purchases. No subscriptions. No ads. No data collection or spying. How It Works: Configure your start time using Start Time (clock time) or Time Remaining (e.g. 5 min to start). Mark your starting line by entering WGS84 coordinates or capturing points as you sail past markers. The app calculates your optimal approach using GPS, showing: - Closest Point (CP) on the starting line with distance, bearing, and optimal speed - Line Crossing Point (LXP) based on your current course - Visual speed indicators (speed up/slow down) - Color-coded timing indicators (early/late) Additional Features: - Large landscape mode for key data - Adjustable target margin to the starting line - Screen keep-alive on critical screens - Calculation of Speed Towards CP (speed-component) - Quick +/- 5-second adjustments to Start Time - Poor GPS data quality indicated in UI - Also works when device is offline or in Airplane Mode - Light and dark mode support - Contextual help on all screens This app balances sophistication with simplicity. Whether you're racing a skiff close to the line or timing a large yacht's offshore start, you'll have the right data at hand. Note 1 - precision: The precision of the app data is inherently limited by the precision of GPS / location services of the iOS device. Precision might vary over time and will be impacted by factors such as reception / placement of the device, free horizons, speed, course stability and RF interference. Calculation algorithms in the app have been developed for general use but might not fit your conditions perfectly. When preparing the start, try to get a feel for what precision you are getting under your specific conditions. Note 2 - battery: For the app to be available exactly when you need it and with best possible location precision, there is a screen keep-alive functionality in this app. This functionality is active if the device is plugged in to a power source or when battery level is more than 20% and not in Low Power Mode. Note that this type of use will drain your battery faster than normal, especially on high-brightness settings. Exit the app or turn off the screen when you do not need it. Note 3 - seamanship: The intended use for this app is as a supplementary aid when starting in a sail race. It is not a navigation tool. Use appropriate tools for navigation and maintain good seamanship.

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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
React Native
Expo
React Navigation
Axios
DateTimePicker
React Query
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.