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
Device Status⁺ CPU x Monitor z
Device Status⁺ is a powerful system monitor and device information toolkit for Apple devices
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
133 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 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 Device Status⁺ CPU x Monitor z: map the core Developer Tools 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
Competitive pricing with generous free tier
Assumption to check: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Focus on most-requested features first
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize for 60fps, fast load times
Assumption to check: Poor performance
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
Device Status⁺ is a powerful system monitor and device information toolkit for Apple devices. Track CPU, RAM, storage, battery health, network speed, temperature, sensors, widgets, Live Activities, and screen diagnostics in real time with a PiP floating window that keeps performance visible while you use other apps. Built for iPhone, iPad, Mac, and Apple Watch with 13+ Home Screen Widgets, 7 Dynamic Island Live Activities, and iOS 18 Control Center integration. REAL-TIME MONITORING - PiP Floating Window: Monitor CPU, network speed, and temperature while using other apps - CPU Per-Core Monitoring: Track P-core vs E-core usage independently with live charts - Memory & Storage: Real-time usage with history trends - Battery Health: Capacity (mAh), charging status, low power mode, charging power estimation - Network Speed: Live upload/download speed tracking with real-time graph - Thermal Status: Device temperature monitoring WIDGETS & LIVE ACTIVITIES - 13+ Home Screen Widgets: CPU, RAM, storage, battery, network speed, cellular data, uptime, clock, temperature, and full info overview - 7 Dynamic Island Live Activities: Network speed, CPU, per-core CPU, clock, temperature, GPS address, and speedometer - iOS 18 Control Center Widgets: Quick access to device info and storage stats SCREEN & DISPLAY TESTING - HDR Screen Testing: White field, grayscale ramp, highlight contrast, and SDR vs HDR comparison - Screen Technology Detection: Identify OLED, LTPO, mini-LED, or LCD panels - Display Specs: Resolution, pixel density, refresh rate, color gamut, Dolby Vision, ProMotion, True Tone, brightness (nits), contrast ratio, color depth, and display manufacturer NETWORK TOOLS - LAN Browser: Discover devices on your network via Bonjour (AirPlay, HomeKit, printers, and more) - DNS Query, Ping, Whois: Complete network diagnostics toolkit - Cellular Data Tracking: Billing cycle monitoring, daily/weekly usage stats, and plan limits with auto-reset DIAGNOSTIC LOG ANALYSIS - Diagnostic Log Analyzer: Import a sysdiagnose archive to browse hardware components, chip details, battery chemistry, cycle count, storage controller, memory, connectivity, and crash reports - Battery Log Analyzer: Import a battery Analytics log for capacity, cell consistency, endurance score, screen-on time, voltage, and temperature - Fully on-device: log parsing works completely offline, nothing is uploaded 30+ SENSOR DETECTION Check availability of LiDAR, UWB, MagSafe, Action Button, Camera Control, Always-On Display, Satellite SOS, NFC, Dual SIM, Face ID, Touch ID, 3D Touch, Accelerometer, Gyroscope, Magnetometer, Barometer, Altimeter, GPS, and Pedometer. MORE TOOLS - PDF Report Export: Generate comprehensive device status reports - GPS Speedometer: Real-time speed display with gauge - Multitouch Test: Verify multi-touch screen functionality - Camera & Microphone Test: Full hardware testing suite - Device Uptime: Detailed runtime information with breakdown - SIM Info: Carrier and SIM card details - WebView Fingerprint: Browser fingerprint detection - Installed Fonts: List all available fonts - Apple Links: Quick access to Apple service pages PRIVACY FIRST All monitoring data and diagnostic logs stay on your device — log analysis works completely offline and nothing is uploaded. Feedback: [email protected] Privacy Policy: https://www.joyk.com/en/doc/device-status-privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
RevenueCat
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.
