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
Snuggly: Record Baby Heartbeat
Hear your baby’s heartbeat anytime, anywhere with Snuggly – Record Baby Heartbeat.
$7.99 · In-app purchases
PRICE
$7.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included18 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.
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 Snuggly: Record Baby Heartbeat: map the core Lifestyle 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
Improve audio processing for clearer recordings.
Assumption to check: Difficulty in accurately capturing baby heartbeats
Validate with people who use this workflow before building.
Hypothesis 2
Add editing features for recordings.
Assumption to check: Limited playback features
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the subscription model and provide clear value propositions.
Assumption to check: Subscription confusion
Validate with people who use this workflow before building.
Hypothesis 4
Create a community feature for parents to share experiences.
Assumption to check: Lack of community support
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
Hear your baby’s heartbeat anytime, anywhere with Snuggly – Record Baby Heartbeat. This fetal heartbeat listener and pregnancy monitor helps expecting parents bond with their little one before birth. Easily hear, record, and share your baby’s heartbeat using only your iPhone. # Why Snuggly? - Listen at Home – Hear your baby’s heartbeat without extra devices. - Record & Share – Save the heartbeat and share it with family & friends. - Bond Stronger – Strengthen your prenatal connection during pregnancy. - Clear Sound – Advanced algorithm improves fetal heartbeat detection. - Easy to Use – Just your iPhone, no additional accessories required. # Perfect for Expecting Parents Snuggly is designed for moms and dads-to-be who want to feel closer to their baby. Use it during pregnancy to capture unforgettable moments and keep them forever. # Important Snuggly is a wellness and bonding app, not a medical device. It is not intended for diagnosis or replacement of medical advice. Always consult your healthcare provider for medical concerns. Works best after the 22nd week.
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
Supabase
Zustand
expo-av
react-navigation
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.
