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
Sono X10 Spirit Box PRO
Sono X10 Spirit Ghost Box PRO is the ultimate tool for both amateurs and professional paranormal investigators
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.4
69 ratings · Below Average
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 included13 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 Sono X10 Spirit Box PRO: map the core Utilities 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
Ensure thorough testing and bug fixing before launch.
Assumption to check: Low user ratings due to bugs and crashes.
Validate with people who use this workflow before building.
Hypothesis 2
Add unique features like customizable audio effects.
Assumption to check: Lack of advanced features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided onboarding process.
Assumption to check: Steep learning curve for new users.
Validate with people who use this workflow before building.
Hypothesis 4
Provide more audio quality settings for better user control.
Assumption to check: Limited audio quality options.
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
Sono X10 Spirit Ghost Box PRO is the ultimate tool for both amateurs and professional paranormal investigators. This PRO version is packed with some of the most requested features in the paranormal community. We have created a Ghost Box and a Spirit Voice Box combined in one single ghost hunting tool. Control the sweeping speed, from 100 ms to 300 ms with the new "low sweep" feature. You can scan random build-in generated frequencies FM and AM or choose to use our new word engine feature, that allows you to activate the build in word database. Sono X10 Spirit Box PRO is the professional version of our popular ghost spirit box! # PRO version includes new features! # Extra Sound bank # FM/AM sweep # Word database, Low sweep # NO ADS # Free updates # Compress Signal (static signal will be compressed, to allow for more clear voices) Our ghost hunting apps are trusted and used by thousands of Paranormal researchers and Ghost hunters around the world from professional to amateur. Sono X10 PRO was designed to be user friendly, but also to give the user some of the best results by using state of the art software engineering and features found nowhere else.
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
Zustand
react-native-sound
expo-sharing
react-native-slider
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.
