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
Enginr: AI Project Builder
Build Engineering Projects Without Feeling Lost:
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 Enginr: AI Project Builder: 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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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
Allow users to fully customize project templates.
Assumption to check: Limited project customization options.
Validate with people who use this workflow before building.
Hypothesis 2
Implement guided onboarding for new users.
Assumption to check: User onboarding is not clear.
Validate with people who use this workflow before building.
Hypothesis 3
Enable offline project access and editing.
Assumption to check: Lack of offline functionality.
Validate with people who use this workflow before building.
Hypothesis 4
Improve AI suggestions based on user feedback and input.
Assumption to check: Limited AI suggestions.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Build Engineering Projects Without Feeling Lost: Whether you want to build a robot, drone, CAD portfolio piece, Arduino system, AI tool, or final-year project — Enginr helps you go from idea to execution. Enginr is your AI-powered engineering project companion, designed specifically for engineering students, aspiring engineers, and makers. No more staring at blank pages. No more abandoning projects halfway through. No more not knowing where to start. WHAT ENGINR DOES Tell Enginr: • Your engineering interests • Your skill level • Your budget • Your available tools • Your project timeframe Enginr then generates: • A complete engineering project roadmap • Structured phases and milestones • Daily engineering tasks • Gantt-style planning • AI-powered debriefs for each task • Progress tracking to keep you consistent It’s like having a project mentor in your pocket. FEATURES AI Project Generation Generate personalised engineering project plans in seconds. Daily Task System Break large projects into manageable daily actions. Gantt-Style Project Tracking Visualise your engineering progress clearly. AI Task Debriefs Understand exactly what needs to be done for every task. Progress & Consistency Build momentum and stay accountable while completing projects. Engineering-Focused UX Built specifically for technical creators and engineering workflows.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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
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BUILD KIT DIFFICULTY
Intermediate
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.
