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
REAL Mountain Lion Calls - Mountain Lion Sounds for iPhone
Want affordable mountain lion hunting calls? The Mountain lionPro electronic mountain lion calls caller app provides you REAL mountain lion hunting calls and mountain lion sounds at your fingertips
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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.
JavaScript is required to complete mailbox verification.
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 REAL Mountain Lion Calls - Mountain Lion Sounds for iPhone: map the core Sports workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Include a wider variety of animal sounds and user-uploaded sounds.
Assumption to check: Limited sound variety compared to other wildlife sound apps
Validate with people who use this workflow before building.
Hypothesis 2
Add functionality to share sounds on social media.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create playlists of their favorite sounds.
Assumption to check: Lack of user customization options
Validate with people who use this workflow before building.
Hypothesis 4
Offer a free trial period for premium features.
Assumption to check: Premium features behind a paywall may deter users
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
Want affordable mountain lion hunting calls? The Mountain lionPro electronic mountain lion calls caller app provides you REAL mountain lion hunting calls and mountain lion sounds at your fingertips. These mountain lion calls are clear, crisp and recorded from REAL mountain lions. 10 unique mountain lion hunting soundtracks included. Connect the app to your speaker and amplifier system to play the mountain lion hunting calls loud. FEATURES: - 10 mountain lion hunting calls - Effective, realistic and clear mountain lion calls - Bluetooth compatible to sync to a Bluetooth speaker - Mountain lion hunting can play in the background of your phone allowing you to text, take pictures and surf the internet without disrupting the mountain lion calling sounds - The soundtracks allow you to set the mountain lion calls and focus on mountain lion hunting - Connect to your speaker system with audio cables or Bluetooth (cables not included) - No more forgetting to grab your MP3 player or memory cards, you always have your phone with you - E-Calling audio for calling mountain lions at a fraction of the cost of purchasing multiple soundtracks and memory cards separately Soundtracks included in "Mountain lionPro" - Mountain Lion Whistle - Mountain Lion Hiss - Mountain Lions Courting - Mountain Lion Growls - Angry Mountain Lion - Mountain Lion Roars - Fawn Distress - Jackrabbit Distress - Rabbit Distress Download Mountain LionPro and start having mountain lion hunting success today!
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
react-navigation
expo-av
react-native-gesture-handler
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.
