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
Pulsey: Hear My Baby Heartbeat
PULSEY: Your Pregnancy Sound Journal
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
253 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.
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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 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.
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 Pulsey: Hear My Baby Heartbeat: map the core Medical 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
Optimize audio loading and caching mechanisms.
Assumption to check: Users find the app slow to load sounds
Validate with people who use this workflow before building.
Hypothesis 2
Offer more sound choices and allow user-defined labels.
Assumption to check: Limited sound categories and customization
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the subscription interface and clarify benefits.
Assumption to check: Subscription management can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Enhance audio recording and playback quality.
Assumption to check: Audio quality needs improvement
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
PULSEY: Your Pregnancy Sound Journal Listen to, record, and save the gentle sounds of your pregnancy. Pulsey uses advanced audio enhancement to help you amplify subtle belly sounds using only your iPhone microphone—no extra accessories needed. HOW IT WORKS Pulsey acts as a sound amplifier for expecting parents. By using sophisticated audio processing, it highlights quiet sounds from your surroundings. Create a beautiful audio keepsake of your journey and build a personal pregnancy sound journal. KEY FEATURES • Belly Sound Amplifier (Premium): Listen to quiet, subtle sounds with sound enhancement. • Record & Save (Premium): Capture audio sessions and build a library of memories. • Pregnancy Countdown: Track your progress with a due date countdown. • Mindful Listening: Designed for relaxing, quiet moments between parent and baby. • Private & Secure: All audio is stored 100% locally on your device. Note: Amplification and Recording features require an in-app purchase. TIPS FOR THE BEST EXPERIENCE • Remove your phone case for better microphone contact. • Find a very quiet room (background noise will be amplified). • Use headphones to hear the enhanced audio clearly. • Be patient—gentle movements and sounds take time to find. PRIVACY & SAFETY Pulsey is for entertainment and wellness purposes only. It is NOT a medical device and is not intended to replace professional medical advice or provide clinical data (such as heartbeat monitoring). For any health concerns, always consult your doctor. PRIVACY POLICY https://www.codivo.io/pulsey/privacy TERMS OF USE https://www.codivo.io/pulsey/terms
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
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.
