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
SkillCat: EPA 608 & HVAC
SkillCat helps you build trade skills, earn certifications, and move your career forward - all from your phone.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
10,387 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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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.
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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 SkillCat: EPA 608 & HVAC: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
SkillCat helps you build trade skills, earn certifications, and move your career forward - all from your phone. No classroom. No big bill. No waiting around for someone to give you permission. Just training that fits your schedule and helps you prove what you know. SkillCat has helped train 500,000+ tradespeople across HVAC, electrical, plumbing, appliance repair, maintenance, and more. What’s Inside: EPA 608 & EPA 609 Certification Study, practice, and take your EPA 608 exam online. Core. Type I, II, III. Universal. No test center. No extra hassle. Trade Career Launch Programs Build the foundation to start strong in the trades. Start with HVAC JobReady Certification, Electrical Basics Certification, or Plumbing Basics Certification. Learn the systems, tools, safety basics, wiring, circuits, troubleshooting, and job-ready skills that help you walk in with more confidence. OSHA-10 Certification Get safety training many employers expect before you step on the job. NATE Certification Prep Build the knowledge you need before taking the next step in your HVAC career. 200+ Trade Courses Learn the skills that matter on real job sites. Airflow. Wiring. Refrigerants. Motors. Diagrams. Troubleshooting. Safety. Tools. Systems. No fluff. No filler. Just training that helps you get better. Built For: Career switchers ready for a better path HVAC students and new techs Techs leveling up Electricians, plumbers, and maintenance workers Anyone tired of dead-end jobs and ready to build something real Why SkillCat: Train from your phone. Anywhere. Anytime. Just $10/month. Certifications employers recognize. Proof of skill, not just attendance. Training built for real workers. Download SkillCat and start training today. Terms of Service: https://www.skillcatapp.com/updated-terms-of-service
Written user reviews are not shown here. Check current App Store reviews >
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
Implement offline downloads for courses.
Assumption to check: Limited offline access to course materials
Validate with people who use this workflow before building.
Hypothesis 2
Add gamification features like instant feedback and explanations.
Assumption to check: Limited interactivity in quizzes
Validate with people who use this workflow before building.
Hypothesis 3
Introduce forums or chat for users to discuss courses.
Assumption to check: No social features for peer interaction
Validate with people who use this workflow before building.
Hypothesis 4
Utilize user progress data to suggest tailored courses.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
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
Supabase
Redux
React Navigation
React Native Video
BUILD KIT DIFFICULTY
Advanced
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.
