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.
App Overview
MyDartCoach - Pro
MyDartCoach is an artificial intelligence that creates individual training plans with the help of machine learning and helps you to train properly in order to achieve the greatest possible training progress.
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
8 ratings · Top 15%
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.
Build your own version
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/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for MyDartCoach - Pro: 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
Offer customizable training plans based on user preferences.
Assumption to check: Limited personalization options for training
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate haptic feedback and visual cues during matches.
Assumption to check: User interaction feedback is minimal
Validate with people who use this workflow before building.
Hypothesis 3
Add features for users to compete with friends or share achievements.
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
Hypothesis 4
Improve app stability and performance under load.
Assumption to check: Occasional app crashes during high usage
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
MyDartCoach is an artificial intelligence that creates individual training plans with the help of machine learning and helps you to train properly in order to achieve the greatest possible training progress. Since this is the PRO version of MyDartCoach, this app contains the "normal" features that the standard version of MyDartCoach also has, NO advertising, caller sounds, individual and AI-generated training tips, as well as the option for in-app Support. We particularly care about those who also support us financially by purchasing MyDartCoach PRO, and we want to offer them an even better training result! The right training is extremely important in order to continuously improve and increase your level. MyDartCoach assesses you precisely, recognizes your strengths, your weaknesses and your potential. Based on this analysis, a new training plan is created for you every day, which contains many different components of the training and creates a training with which you will achieve the greatest possible success. And all of this, regardless of whether you are a newcomer or already a world champion. Thus, MyDartCoach relieves you of the thought and planning of the training and you can concentrate fully on developing your potential and improving your game qualities! "If I don't, the others will." ~ Peter Wright, 2020 World Champion
Written user reviews are not shown here. Check current App Store reviews >
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
Zustand
Supabase
react-native-chart-kit
@supabase/supabase-js
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.
