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.
A high quality Speedometer app with the same sophisticated brain inside as our paid version
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Speedometer 55 GPS Speed & HUD: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Users report inaccuracies in speed readings
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase prompts can be intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No customization for UI themes
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
A high quality Speedometer app with the same sophisticated brain inside as our paid version. When you go over a preset speed limit, the large digits change colour from green to red and the device emits a loud sound to alert you! Great for avoiding speeding tickets! ‣ Easy to set and configurable speed limits Set speed limits with 4 fast and configurable presets. Presets only need a single tap and are the safest way to set the limits! ‣ S.O.S. Flat tyre or worse? Our speedometer shows your current location and you can share it easily (sms/text, email) with car assistance services, ambulance or friends. ‣ Know your car's limits ! Does your car become sluggish on those steep climbs? Is it possible you got too high in mountains ? Our built-in altimeter will provide you with accurate readings that indicate your height over sea-level. ‣ In a dispute for speeding? GPS Black box gives you point by point time, speed, location and altitude data for the last 20 minutes of your travel. You can email its data as an excel or csv file. Or you can surely switch it off or reset at any moment. ‣ Need to know where you are? Integrated map shows your location and a tracking "tail" behind you. ‣ Mileage, cost and fuel calculator. Find alternative driving routes based on start/end address and see their distance/duration, estimated cost and fuel required. For regular routes, set week days and dates range to see the total estimated cost/fuel, one-way or return. Available for iOS 15 and later. ∙∙ UNIVERSAL APP. Speedometer for iPhone and 3G-iPads. Retina graphics included. ∙∙ 000-999 SPEED AND LIMIT RANGE. MPH, KMH AND KNOTS. Maximum, average speed, distance traveled. ! You can use this app on your iPhone 3GS, 4, or 4S as well as on any iPad with 3G. **App will not work properly on iPods and wifi only iPads as they don't have GPS chip (External GPS module is required). ! Please note that as with all GPS apps, continued use of GPS running in the background can dramatically decrease battery life. Drive safely and avoid paying those speeding fines! Our speedometer is the ideal watchdog companion no matter what journey you are going on! Full version of the speedometer gives you ability to work in background, GPS tracking, waypoints, trip cost computer, Siri shortcuts for applying speed limits and controlling track recording, 100+ customization options and more. Be sure to check it out in the AppStore! * A bit of instructions: If speedometer doesn't show you the speed, just be sure to be under the open sky to have GPS signal. Under the open sky, within 5-10 seconds GPS indicator will become green and speedometer will start showing the speed. ** If you wonder why gps speedometer may show 3-5 mph (3-8 kmh) less than a car's speedometer, you can take a look here: http://goo.gl/wtLvT (tomtom's discussion thread). *** And here is an amazing article http://goo.gl/p5zfMi explaining why GPS might show you 80ft (or -80!) altitude when you are laying on the beach. Don't throw the app or iPhone away just because of that! :) Let us use the article's last sentence here: "Those who use GPS altitude to aid in landing their small plane should have their insurance policies paid up at all times".
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.