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
Nearby Lens: Glasses Detector
Detect Hidden Smart Glasses & Bluetooth Devices Nearby
$1.99 · In-app purchases
PRICE
$1.99
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.
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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 Nearby Lens: Glasses Detector: 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
Enhance detection algorithms for better accuracy in low light.
Assumption to check: Inaccurate detection of glasses in various lighting conditions.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate with more retailers for a wider selection of eyewear.
Assumption to check: Limited eyewear recommendations.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image processing to speed up result generation.
Assumption to check: Slow loading times for detection results.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to rate and give feedback on detected eyewear for better personalization.
Assumption to check: No user feedback options or ratings for detected glasses.
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
Detect Hidden Smart Glasses & Bluetooth Devices Nearby Did you know smart glasses like Ray-Ban Meta constantly broadcast a Bluetooth signal while being worn? Someone nearby could be recording without you knowing. Nearby Lens is a powerful Bluetooth scanner that finds smart glasses, hidden BLE devices, and surveillance gadgets in real time — no pairing, no setup required. HOW IT WORKS Smart glasses such as Ray-Ban Meta, Snap Spectacles, and Vuzix continuously emit Bluetooth Low Energy (BLE) signals. Nearby Lens detects these signals instantly, showing you confidence scores and estimated distance. SUPPORTED DEVICES • Ray-Ban Meta smart glasses • Snap Spectacles • Vuzix smart glasses • XREAL / Nreal Air • Rokid, RayNeo, Solos, and more KEY FEATURES • Real-time Bluetooth scanner & device detection • Confidence score for accurate identification • Estimated distance in meters • Background scanning — works with screen off • Live Activity & Dynamic Island support • Lock Screen & Home Screen widgets • Siri Shortcut: "Start glasses scan" • Instant alerts with device brand • Detection history with copy & share • Works offline — no internet required PRIVACY FIRST Nearby Lens is a privacy protection tool — not a tracking app. • No GPS data collected • No microphone access • No personal data stored All processing is on-device. MAC addresses are hashed — never stored raw.
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
React Navigation
Axios
@react-native-async-storage/async-storage
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.
