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.
This app may just change the way you do business.
$34.99 · 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 HVAC Residential Load Calcs: map the core Business 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 functionality for complex calculations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user interface design
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of detailed help or tutorials
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High price point for a limited feature set
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.
This app may just change the way you do business. This is one of the longest running HVAC Manual J8 cooling and heating load calculation apps on the market today. See why tens of thousands of engineers, technicians, and architects have licensed our software for their HVAC engineering needs. (For full online help, click here: http://bit.ly/1GlRulY. For training webinar, click here: http://bit.ly/1IHn7nA) This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539. This app allows you to perform detailed block and room-by-room heating and cooling loads for residential buildings out in the field, by taking advantage of the simplicity and power of the iPhone. This app was designed by Carmel Software Corporation, a 25-year old software design firm specializing in engineering analysis software applications. We are not just 1 person designing mobile apps out of a bedroom. We are a team of software developers and engineers with over 50 years combined software and engineering design experience. In fact, our software powers the analysis capabilities of major Autodesk (The makers of AutoCAD) software tools such as Autodesk Revit. The following is just a small sample of the features included in this app: 1. Calculations based upon abridged ACCA Manual J8 calculations (This is not an ACCA-approved app. For our ACCA-approved iPad app, search for the HVAC ResLoad-J app on the app store) 2. Includes a 1000+ world-wide city weather database 3. Includes data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, ceilings, and more 4. Allows you to create and store an unlimited number of projects 5. Allows you to create an unlimited number of rooms and view individual loads and airflows for those rooms 6. Allows you to specify an unlimited # of opaque types (ie – doors, walls, roofs, floors, ceilings), window types, and skylight types for each building 7. Allows you to instantly view total heating and cooling load results as you update input data 8. Allows you to view comprehensive cooling and heating load breakdown reports including breakdown by opaque load, window load, skylight load, infiltration load, ventilation load and internal load contributions 9. Opaque inputs include opaque type, opaque construction number, dimensions, and opening areas 10. Window inputs include window type, internal and external shading type, overhang dimensions, window area, and more.. 11. Additional input types include # of people, # of bedrooms, ventilation airflow, and more.. 12. Includes ability to display a wide variety of on-screen reports including checksum reports (ie – BTUh/SqFt, SqFt/Ton, etc.), complete heating and cooling load breakdown reports, and even graphically-pleasing pie charts showing cooling and heating load breakdowns 13. Includes the ability to display a comprehensive HTML report that you can email to yourself or others, and it also includes a spreadsheet attachment that you can open in Excel to further massage data on your desktop 14. Includes English (IP) or Metric (SI) units 15. This is the same technology that powers the Trane MAP iPad app that they offer to their elite dealer network The benefits of using this app are numerous including: 1. Great for use out in the field. Quickly size heating and cooling equipment, show the client, then email the results back to your office for further analysis. 2. Show off your advanced on-screen reports to clients convincing them you are using cutting-edge technology 3. Save time by inputting information in the field and then returning to your office to perform more in-depth analysis
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.