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
Diskio - Disk Speed Analyzer
Welcome to Diskio 2.0, the ultimate disk speed testing solution for iOS, now completely redesigned and more powerful than ever.
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
15 ratings · Top 50%
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 included16 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 Diskio - Disk Speed Analyzer: 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
Add more detailed analytics and graphs to visualize speed tests.
Assumption to check: Limited functionality compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a calibration feature to improve accuracy.
Assumption to check: Inconsistent results based on device performance
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI with animations and better graphics for results.
Assumption to check: User interface could be more engaging
Validate with people who use this workflow before building.
Hypothesis 4
Integrate sharing features to allow users to share their results easily.
Assumption to check: No sharing options 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
Welcome to Diskio 2.0, the ultimate disk speed testing solution for iOS, now completely redesigned and more powerful than ever. Experience Unmatched Precision: Our advanced algorithms deliver the most accurate speed tests available for all your storage devices. Trust the numbers you see—they reflect true performance. Test Any Storage Device: From your iPhone's internal storage to external drives connected via USB-C or Lightning, Diskio measures them all with laboratory-grade precision. Customized for Power Users: Tailor your tests by adjusting file size and chunk size parameters to match your specific needs. Whether you're a tech enthusiast or IT professional, get the exact insights you require. Simple Three-Step Process: 1. Select your storage location (internal or external) 2. Choose your test parameters 3. Get comprehensive results in seconds Universally Compatible: Works flawlessly with all iOS devices and external storage solutions including USB drives and SD cards. Regularly updated for the latest iOS versions. Why Diskio Matters • Identify performance bottlenecks before they impact your work • Make informed purchases when investing in new storage • Verify you're getting the speed you paid for • Monitor drive health and performance over time Download Diskio today and discover what your storage is truly capable of!
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
expo-sharing
expo-clipboard
axios
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.
