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.
Measuring your car's torque and horsepower has never been easier, now that you can do it with the help of your mobile device and this digital Dyno
$13.99 · 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 Log Dyno: map the core Sports 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 find it hard to navigate between logging workouts and viewing history.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited exercise variety may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription options are unclear and hard to compare.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: The app lacks community features for motivation.
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.
Measuring your car's torque and horsepower has never been easier, now that you can do it with the help of your mobile device and this digital Dyno. You just need to open your datalog of a pull, and Log Dyno will do the rest. You can send your CSV file from your email, browser, or any app to Log Dyno which will Open the datalog from the app right away and give you a measurement, or you can save your CSV file to the Log Dyno folder in your Files app, for easy access from the in-app file browser. You can use any CSV or MSL file that contains RPM data which is needed to accurately measure Horsepower and Torque. From the torque curve and gear ratios, the app will also recommend optimal gear shift points for each gear to ensure maximum acceleration. This makes sure you know when to shift, so you always have the most possible power at the wheels. Corrections: ● Uncorrected ● SAE J1349 ● STD ● DIN 70020 ● ISO 1585 Power Units: ● WHP ● BHP ● PS ● KW Torque Units: ● LB-FT ● NM Either at the wheels or at the crank Compare multiple measurements! You can save each one of your Dyno measurements, and compare them, or just analyze them interactively. What datalog files can be used? ● JB4 ● MHD ● ProTool ● COBB ● MegaSquirt ● ProTool ● Bootmod3 ● and any other CSV file This is the easiest way to have your torque and horsepower measured with a virtual dyno using only your mobile phone and your datalog. You can see if your mods or tune work right away, and compare them. Log Dyno has been compared to multiple real life dyno sheets, and measurements were spot on, with multiple different vehicles How does it work? #1. Datalog your vehicle Take the log just like a dyno pull, in one given gear, from low rpm to high rpm. Try to avoid wheelspin as it can cause spikes in the graph. #2. Set up your vehicle data The dyno app requires some data about your vehicle. You’ll be asked to set values for the following: ● Car Name ● Weight ● Tank Capacity ● Tire Size ● DT% ● Drag Coefficient ● Frontal Area #3. Share the results! You can share your results right from the virtual dyno measurement page to basically any app or post it to any social network or email it. Of course, you can just save the results in your phone gallery too. How accurate is the dyno measurement? If you have set your vehicle data correctly, the results our dyno app gives will be the same as the results a real dyno will give you. Also, keep in mind that wheelspin may result in spikes in the graph. If you are unable to avoid it, you’ll still get accurate results, you just need to ignore the spikes. The best thing about our dyno app is that you can see right away how your mods work after datalogging. Now, you don't have to go to the dyno if you want to measure any small modification or just never had your car's power measured. You can see right away how your mods or tune work after datalogging. You can dyno unlimited times and unlimited vehicles for the fraction of the price of a dyno measurement. You have to set your car up, how much it weighs, its tire size, the gear ratios, and also what your car drag coefficient and frontal area are, which the app will help in determining. After specifying for which gear you had the datalog taken and specifying the driver, passenger, and possible cargo weight, you can open the CSV or MSL file. Based on your car data and environmental values, the app generates a torque and horsepower curve, which you can analyze. The app also points out the peak values, and you will be able to see at what rpm you made the most torque and the most power. If you have any questions feel free to send an email: [email protected]
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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.