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.
Oilmanac is a maintenance manager and service log for all your machines with small engines
$2.99 · 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 Oilmanac: map the core Productivity 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: Limited customization options for maintenance notifications
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No integration with service providers for direct scheduling
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Maintenance logging can be tedious
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No analytics on vehicle performance
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.
Oilmanac is a maintenance manager and service log for all your machines with small engines. It keeps all your maintenance data in one convenient place - on your iPhone, iPad, or both. No need to dig out the user manual and page through it every year to perform routine maintenance on your machine. Pull up the machine in Oilmanac, and all the information you need to perform the maintenance is immediately available. Once the maintenance is completed, you can easily record all the services you performed in the Service Log tab. Enter your model specifications and maintenance recommendations for each machine from your user manual, or download them from the user database if available. A wide variety of machine types are available, including lawn mowers, lawn edgers, leaf blowers, yard vacuums, weed trimmers, hedge trimmers, tillers, power washers, water pumps, augers, chainsaws, log splitters, generators, snow blowers, outboard motors, personal water craft, all terrain vehicles, and snowmobiles. Available services are tailored to the specific machine, including oil and oil filter change, spark plug change, air filter clean and change, transmission/gear oil change for self propelled machines, grease, and others. Additional features: ∙ Automatically download model specifications and maintenance recommendations from the user database ∙ Complete service record for all your machines ∙ Create shopping lists for material needed for service: oil, filters, spark plugs and more ∙ Set reminders when service is due for each machine, or schedule annually ∙ iCloud sync: all your machine data is stored securely in your iCloud account, and is available on all your iOS and macOS devices logged into iCloud - iPhone and iPad, and now your Macs with Oilmanac for macOS. (Requires iCloud Drive. Oilmanac for macOS available as separate purchase on the Mac App Store.)
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.