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
Breadpad - SPICE Simulator
Breadpad is your go-to analog/digital electronics lab, featuring an interactive breadboard and advanced SPICE simulation
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.9
157 ratings · Top 50%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 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 Breadpad - SPICE Simulator: map the core Developer Tools 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
Offer a wider variety of components and custom options.
Assumption to check: Limited component selection for simulations
Validate with people who use this workflow before building.
Hypothesis 2
Optimize the simulation engine for better performance.
Assumption to check: Performance issues with complex circuits
Validate with people who use this workflow before building.
Hypothesis 3
Implement guided tutorials or tooltips to assist new users.
Assumption to check: User interface can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 4
Provide more free features to encourage user retention.
Assumption to check: Subscription model may deter casual users
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
Breadpad is your go-to analog/digital electronics lab, featuring an interactive breadboard and advanced SPICE simulation. Easily add components, wire them up, and analyze your circuits with a virtual oscilloscope and logic analyzer. Execute full SPICE netlists for unparalleled precision. Choose from a vast library of ready-to-use parts or create your own custom elements. Dive in for free or upgrade to unlock powerful data export capabilities and superior simulation features. Free Features: - Effortlessly wire up components on a digital breadboard - Choose from over 400 integrated circuits or craft your custom chips using SPICE - Insert resistors, capacitors, inductors, transistors, and diodes with accurate models - Instantly see how changes affect your circuit with quick-rendering graphs - Take snapshots of your breadboard setups for easy inclusion in documents or online - Import PSPICE and LTSpice netlists for comprehensive simulations (.spice and .cir files) - Work together using iCloud, iMessage, Airdrop, email, Google Drive, OneDrive, and Dropbox - Explore a wide selection of pre-configured diodes and transistors with numerous tweakable settings - Open any .breadpad file at no cost, even those from Premium users - Experience your designs in 3D with Apple Vision Pro Premium subscription unlocks: - Infinite vector plotting from your SPICE simulations - Conduct temperature sensitivity analysis to assess environmental impacts on circuits - Access five extra voltage sources, including piecewise and frequency-modulated options - Export your simulation results to CSV for analysis in tools like Excel, MATLAB, or Python - Directly modify the SPICE netlist for any component on your breadboard - Fine-tune component tolerances using six-sigma gaussian distributions - Analyze manufacturing variance effects with dynamic Monte Carlo simulations Whether you're a student, hobbyist, or professional engineer, Breadpad is the perfect tool for brainstorming, designing, and refining your circuit ideas. Explore new principles, experiment with designs, and optimize existing systems. Get Breadpad today and elevate your circuit simulation experience. Exclusively on iPad, iPhone, Mac, and Vision Pro. Privacy policy: https://breadpad.com/privacy/ Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
React Native
Expo
Supabase
Redux
React Navigation
React Native Gesture Handler
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.
