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
DeepBreath: Apnea & CO2 Tables
Daily breath training for freedivers, scuba divers, and anyone looking to improve breath control
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 ratings · Top 5%
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/
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 DeepBreath: Apnea & CO2 Tables: map the core Health & Fitness 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
Incorporate user-generated content and regular updates.
Assumption to check: Limited training programs and content updates
Validate with people who use this workflow before building.
Hypothesis 2
Simplify logging process with a streamlined UI.
Assumption to check: Difficulty logging dives with complex interfaces
Validate with people who use this workflow before building.
Hypothesis 3
Add social features for sharing experiences and tips.
Assumption to check: Lack of social features for community interaction
Validate with people who use this workflow before building.
Hypothesis 4
Introduce tiered pricing and a free trial to attract users.
Assumption to check: High subscription cost for premium features
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
Daily breath training for freedivers, scuba divers, and anyone looking to improve breath control. Five core exercises cover everything from beginner box breathing to competition-style apnea tables. CORE EXERCISES • Box Breath — Equal-ratio breathing for calm focus • Breath-Up — Pre-dive preparation sequence • Air Save — Continuous cadence for efficient air use • CO₂ Tolerance Table — Decreasing rest intervals to build CO₂ tolerance • O₂ Tolerance Table — Increasing hold times to extend breath capacity ADVANCED TRAINING For experienced divers: structured programs including Frenzel and mouthfill equalization drills, pre-dive routines, static apnea intervals, and mammalian dive reflex conditioning — all designed for safe, dry-land practice. BUILT FOR CONSISTENCY • Session history with personal bests • Daily training streaks with unlockable sea creatures • Fully adjustable timings for every exercise • Quiz mode to train focus under breath-hold pressure • Ambient soundscape with meditation gong cues • Haptic feedback guides you through each phase All training is intended for dry land only. Never practice breath-holds in water without supervision.
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
Axios
React Navigation
React Query
Async Storage
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.
