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
HEARING AID APP - Live Listen
◆ HEARING AID APP WITH 11× SOUND BOOST
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
2,082 ratings · Top 30%
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 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 HEARING AID APP - Live Listen: 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
Provide more granular equalizer settings and profiles.
Assumption to check: Limited audio customization options.
Validate with people who use this workflow before building.
Hypothesis 2
Implement smarter noise cancellation algorithms.
Assumption to check: Inconsistent performance in noisy environments.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate a live chat support feature for immediate assistance.
Assumption to check: Poor user support responsiveness.
Validate with people who use this workflow before building.
Hypothesis 4
Create a guided onboarding experience to simplify setup.
Assumption to check: Complex initial setup process.
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
◆ HEARING AID APP WITH 11× SOUND BOOST ◆ LIVE LISTEN & AMPLIFY ◆ TEST HEARING & SAVE TO APPLE HEALTHKIT ◆ MUSIC VOLUME BOOST — LIVE LISTEN ◆ START HEARING CLEARLY WITH SOUND AMPLIFICATION ● Award-Winning: ◦ Recognized as the Microsoft Inspire P2P Contest Winner in 2017 & 2018 ◦ PC Magazine – Best Soft of 2014 ◦ Lern Award – The Best Learning Program 2018 ◦ Science About Us: 55+ research publications FREE Features: ● Personalized hearing correction for each ear ● in-situ (built-in) hearing test ● Dynamic compression to amplify quiet sounds ● 4 sound amplification modes ● Live Transcriber - speech-to-text for conversations & lectures ● Supports Bluetooth devices & wireless headphones, including AirPods ● Apple HealthKit integration: monitor and track hearing changes ● Built-in Music Player ● Tinnitus Pitch Matching Test PREMIUM LISTENING Features: ● Built-in music player with amplified sound for hearing-impaired users ● Super Boost: Boost sound up to 1000% with standard headphones ● Adaptive 4-week course to help your hearing adjust to hearing aid ● Unlimited sound profiles for various sound environments ● Noise suppression for clearer speech ● Advanced amplification modes: “Super Boost” & Dectone ● Tinnitus-friendly quiet sound amplification ● Recorder with speech-to-text ... and much more! Subscription Details: ► Unlock ALL premium features ► Choose from weekly, monthly, annual, or lifetime access plans ► Manage or cancel anytime from your App Store account settings ► Auto-renewals can be turned off 24 hours before the current period ends ⁕⁕⁕ IMPORTANT TIPS: ⁕⁕⁕ Adapting to a hearing aid can take weeks to months. You'll notice sounds previously unheard. Use noise reduction for comfort. Familiar sounds might seem different initially. MAKE THE MOST OF THE BUILT-IN 4-WEEK ADAPTIVE COURSE! Did You Know? ◆ Using a hearing aid can reduce the risk of dementia by 75% ◆ 1 in 3 adults over 65 needs hearing support ◆ Untreated hearing loss increases cognitive decline risk by 40% Bluetooth note: Using a Bluetooth headset might introduce a slight delay and potential echoing. Disclaimer: Petralex® is not a certified medical device. Always consult with a professional for audiological needs. The app's audiometric test aids in adjustment and isn't a professional evaluation substitute. Questions or Feedback? We're here to help. Contact us at [email protected] - Terms of service: https://petralex.pro/page/terms - Privacy policy: https://petralex.pro/page/policy
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.
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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.
