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 Tester: Check & Monitor
Full Device Diagnostics – Your Phone's Health at Your Fingertips!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
831 ratings · Top 15%
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 included13 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 Device Tester: Check & Monitor: 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.
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
Expand testing options to cover more device attributes.
Assumption to check: Limited test types available
Validate with people who use this workflow before building.
Hypothesis 2
Improve accuracy and reliability of testing algorithms.
Assumption to check: Inconsistent performance results
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer instructions and progress indicators.
Assumption to check: Poor user guidance during tests
Validate with people who use this workflow before building.
Hypothesis 4
Add functionality to share test results easily.
Assumption to check: No export or sharing feature for results
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
Full Device Diagnostics – Your Phone's Health at Your Fingertips! Tired of guessing if your phone is working properly? With our app, you can instantly test your device’s hardware and ensure it’s in top shape. From the camera to the microphone, GPS, and sensors – check it all in seconds! Key Features: Full Hardware Scan: Test cameras, speakers, microphone, flashlight, and more. System Reports: Get detailed insights into your device's performance. Quick One-Tap Testing: A seamless way to ensure everything is running smoothly. Battery & RAM Info: Monitor your device’s key resources in real-time. Easy to Use: Simple and intuitive interface – no tech skills required! Why Choose Us? Fast, accurate, and reliable. Regular updates to add more hardware tests. Designed to optimize device longevity and performance. Perfect for: Checking your phone after repair. Diagnosing potential issues before they worsen. Ensuring all features work before buying or selling a device. Peace of Mind is Just One Tap Away! Download now and keep your phone healthy.
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
axios
react-native-chart-kit
react-navigation
react-native-async-storage
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.
