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 Monitor: System Checker
Device Monitor is a powerful all-in-one device monitoring app built exclusively for iPhone and iPad
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
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
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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 included17 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.
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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 Monitor: System Checker: 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
Allow users to customize which metrics to monitor.
Assumption to check: Limited customization options for system checks
Validate with people who use this workflow before building.
Hypothesis 2
Provide tooltips or info icons explaining each metric.
Assumption to check: Lack of detailed explanations for metrics
Validate with people who use this workflow before building.
Hypothesis 3
Optimize system check algorithms for speed.
Assumption to check: Occasional performance lags during checks
Validate with people who use this workflow before building.
Hypothesis 4
Implement a feature for users to set up scheduled checks.
Assumption to check: No option to schedule regular checks
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 Monitor is a powerful all-in-one device monitoring app built exclusively for iPhone and iPad. Get real-time insights into your CPU, RAM, storage, battery, network, sensors, and overall device performance - all from one clean and easy-to-use dashboard. Designed for users who want full control over their device, app helps you monitor performance, check hardware status, and better understand your iPhone or iPad. Why choose Device Monitor? • Clean, modern, and intuitive interface • Real-time system monitoring • Fast and lightweight performance tools • Easy access to important device information • Privacy-focused experience Detailed Information About: - DEVICE DETAILS - CPU PERFORMANCE & USAGE - GPU STATUS - RAM / MEMORY USAGE - STORAGE SPACE - BATTERY HEALTH & CHARGING STATUS - NETWORK SPEED & CONNECTION INFO - DISPLAY INFORMATION - CAMERA DETAILS - SENSORS STATUS - THERMAL / TEMPERATURE DATA (supported devices) Built-in Monitoring Tools - CPU usage tracker - Memory monitoring - Battery information - Storage analyzer - Sensor checker - Network monitoring - Hardware information viewer - Performance insights Privacy First Device Monitor does not collect personal data or track your activity. Your information stays private. Perfect For - Power users - Gamers - Developers - Tech enthusiasts - Everyday users who want to monitor device health Download Device Monitor Today Track CPU usage, monitor RAM, check battery health, analyze storage, and view real-time device stats with Device Monitor. the complete monitoring app for iPhone and iPad.
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
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.
