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
eyeSpeed Speedometer
YOUR SPEEDOMETER
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 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
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 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.
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 eyeSpeed Speedometer: map the core Navigation 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
Add route planning and offline maps.
Assumption to check: Limited features compared to other navigation apps.
Validate with people who use this workflow before building.
Hypothesis 2
Provide options for manual input or calibration.
Assumption to check: Requires GPS for accurate speed tracking.
Validate with people who use this workflow before building.
Hypothesis 3
Implement CarPlay support for driver convenience.
Assumption to check: No integration with CarPlay.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance design aesthetics for a modern look.
Assumption to check: Basic UI design.
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
YOUR SPEEDOMETER. YOUR LOOK. SAME PRIVACY. eyeSpeed V4 adds themes so your speedometer can feel more at home in your car without turning a focused driving tool into a bloated dashboard. Choose from 34 built-in looks inspired by dashboard history, save one theme for light appearance and another for dark appearance, or build a custom theme with your preferred colors and font family. Themes arrive as part of eyeSpeed, not as an extra purchase, and they are free for current users. Your location still stays on your device. No ads. No subscriptions. No account required. THEMES THAT FIT THE CAR • 34 built-in themes - Choose from a curated set of heritage-inspired looks • Day and night slots - Save one theme for light appearance and another for dark appearance • Saved custom themes - Build and name your own look • Clean readability - Personalization without clutter • Built for real driving - Better visual fit for day, night, and different cabins • Included with eyeSpeed - No theme pack IAP or upgrade fee PRECISION SPEED • GPS-based readings - Check your actual speed with a clean, glanceable display • Large numerals - Easy to read without hunting for information • MPH or KPH - Quick switching for imports, travel, and track-day use LIVE ACTIVITIES • Lock Screen speed - Keep speed visible without unlocking your phone • Dynamic Island - Check speed while using Apple Maps or other apps • Modern iPhone fit - The speedometer stays useful beyond the main screen DRIVER CONTROL • Unit Lock - Prevent accidental changes while driving • Rotation Lock - Keep the display the way you want it • Auto-Hide Toolbar - Reduce distractions after a few seconds • Screen Sleep Prevention - Keep the display awake while you drive PRIVACY WITHOUT COMPROMISE • Data Not Collected - Location data is not sent to eyeSpeed • On-device speed calculation - GPS is used for speed, not tracking you • No account required - No sign-in wall between you and the app • One-time purchase - Buy it once and keep it BUILT FOR REAL DRIVERS • Great for imported vehicles - Fast MPH/KPH switching when the car and road disagree • Useful with navigation - Keep speed visible while Maps stays on screen • Focused interface - One screen, one number, less noise Safety Notice: eyeSpeed is for informational purposes only. Always drive safely and follow local traffic laws. Never use your phone while driving.
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
Zustand
react-navigation
expo-location
react-native-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.
