⚡ Circuit Calculator – iOS App Template

Professional Circuit Analysis & Calculator App for iOS • SwiftUI • MVVM • StoreKit 2 • White-label ready

Transform this premium iOS app template into your own branded electrical engineering tool! Circuit Calculator is a comprehensive, production-ready iOS application crafted for electrical engineers, students, hobbyists, and professionals. This white-label template offers a full suite of circuit calculation tools with a beautiful, modern interface built entirely in SwiftUI.

Ideal For

• Reselling as your own branded app
• Educational institutions
• Engineering tool companies
• Electronics hobbyist communities
• Technical training programs

✨ Key Features

13+ Professional Calculators

Basic Calculators (Free Tier)

• Ohm’s Law Calculator — calculate V, I, R, P from any 2 values
• Resistor Series/Parallel — combine up to 20 resistors
• Voltage Divider — calculate output voltage from divider circuits
• LED Resistor Calculator — current-limiting resistor calculation
• RC Time Constant — charging/discharging time calculations

Premium Calculators (IAP Unlock)

• Loaded Voltage Divider — divider with load resistance
• Capacitor Calculator — series/parallel capacitor combinations
• Inductor Calculator — series/parallel inductor combinations
• Reactance Calculator — capacitive/inductive reactance (X_C / X_L)
• Power & Energy Calculator — advanced power calculations
• Wire Voltage Drop — voltage drop in wires (AWG 10–30)
• LED String Calculator — multiple LEDs in series
• E-Series Finder — nearest standard values (E6, E12, E24, E48, E96)

Circuit Builder (Premium)

• Interactive Circuit Designer — drag-and-drop circuit creation
• Component Library — resistors, capacitors, inductors, sources, ground
• Visual Circuit Analysis — real-time circuit validation
• Save & Load Circuits — persistent circuit storage
• Export Circuits — share your designs easily

Project Management

• Unlimited Projects — organize calculations by project
• Folder System — custom folders with colors and icons
• Calculation History — track all your calculations
• Search & Filter — quickly find past calculations
• Export to PDF — professional calculation reports

Reference Library

• Formula Reference — quick access to key formulas
• Component Guides — resistor color codes, capacitor markings
• E-Series Tables — standard component value tables
• Wire Gauge Charts — AWG resistance and current ratings

Monetization Ready

• In-App Purchase Integration — StoreKit 2 implementation
• Premium Feature Gating — configurable free/premium features
• Restore Purchases — full restoration support
• Paywall Screen — beautiful, conversion-optimized paywall

Modern UI/UX

• SwiftUI Interface — native iOS 16+ design
• Dark Mode Support — automatic light/dark switching
• Smooth Animations — polished, professional feel
• Responsive Design — works on all iPhone and iPad sizes
• Accessibility — VoiceOver + Dynamic Type support

Export & Sharing

• PDF Export — generate professional calculation reports
• Image Export — save calculations as images
• Text Sharing — copy results to clipboard
• Share Sheet Integration — share via any app

Why Choose This Template?

✅ Production-Ready

• No Bugs — thoroughly tested and stable
• App Store Ready — follows Apple guidelines
• Clean Code — well-organized and maintainable
• No Dependencies — 100% native iOS frameworks

✅ Easy to Customize

• Centralized Configuration — single file (AppConfig.swift)
• Comprehensive Documentation — step-by-step reskin manual included
• Feature Toggles — enable/disable features with booleans
• Theme System — adjust colors quickly

✅ Professional Architecture

• MVVM Pattern — clean separation of concerns
• SwiftUI — modern declarative UI
• CoreData — robust local persistence
• Combine — reactive state for smooth UX
• StoreKit 2 — latest IAP implementation

✅ Monetization Optimized

• Proven IAP Flow — tested purchase funnel
• High-Value Premium Features — advanced calculators + circuit builder
• Generous Free Tier — attract users and improve conversion
• Restore Purchases — complete restoration support

Technical Specifications

Requirements

• iOS: 16.0 or later
• Xcode: 15.0 or later
• Language: Swift 5.9+
• UI Framework: SwiftUI
• Architecture: MVVM
• Persistence: CoreData
• IAP: StoreKit 2

Frameworks Used

• SwiftUI (UI)
• CoreData (Persistence)
• StoreKit 2 (In-App Purchases)
• Combine (Reactive programming)
• PDFKit (PDF generation)
• UIKit (Image export)

✅ No External Dependencies

• No CocoaPods
• No Swift Package Manager
• No Carthage
• 100% Native iOS

What’s Included

Source Code

• ✅ Complete Xcode project
• ✅ 60+ Swift files with comprehensive comments
• ✅ All assets and resources
• ✅ CoreData model files
• ✅ Unit test examples

Documentation

• ✅ RESKIN_MANUAL.md — step-by-step customization guide
• ✅ INSTALLATION_GUIDE.md — quick start for developers
• ✅ README.md — project overview
• ✅ Inline Code Comments — every function documented

Configuration

• ✅ AppConfig.swift — centralized configuration (400+ lines)
• ✅ Feature toggles for all calculators
• ✅ Theme + typography settings
• ✅ IAP configuration and free-tier limits

Assets

• ✅ App icon template
• ✅ Launch screen
• ✅ SF Symbols integration
• ✅ Color assets

Target Audience

End Users

• Electrical engineering students
• Professional engineers
• Electronics hobbyists
• Makers and DIYers
• Technical educators

Buyers (You!)

• App resellers
• Educational institutions
• Engineering companies
• Tech startups
• Independent developers

Monetization Strategy

Recommended Pricing

• Free Download — attract users with the basic calculators
• Premium Unlock — $4.99–$9.99 one-time purchase (recommended)
• High Value — advanced calculators + Circuit Builder justify the upgrade

What’s Free vs Premium

• Free (5 Calculators): Ohm’s Law, Resistor Series/Parallel, Voltage Divider, LED Resistor, RC Time Constant
• Premium (8+ Calculators + Features): advanced calculators, Circuit Builder, unlimited projects/history, step-by-step explanations, E-series suggestions, PDF export

️ Customization Options

Easy to Change

• ✅ App name and branding
• ✅ Color scheme (entire app theme)
• ✅ Typography and fonts
• ✅ Feature availability
• ✅ Free tier limits
• ✅ IAP product ID and pricing
• ✅ Support email and URLs

Moderate Customization

• ✅ Add/remove calculators
• ✅ Modify formulas
• ✅ Adjust UI layouts
• ✅ Integrate analytics
• ✅ Add advertisements

Advanced Customization

• ✅ New calculator types
• ✅ Cloud sync
• ✅ User accounts
• ✅ Multi-language support
• ✅ Custom export formats

Learning Value

For Developers

• Learn SwiftUI best practices
• Understand MVVM architecture
• Master CoreData integration
• Implement StoreKit 2 IAP
• PDF generation techniques
• State management with Combine

For Students

• Real-world app structure
• Professional code organization
• Testing strategies
• UI/UX design patterns

Unique Selling Points

1. Comprehensive Feature Set — calculators + circuit builder + project system + export
2. Premium Quality UI — modern design, smooth animations, polished UX
3. Easy Reskin — single config file + documentation
4. Monetization Ready — StoreKit 2 + paywall + feature gating
5. No Dependencies — 100% native Swift and Apple frameworks

Additional Services

Need help? We offer professional services to support your launch.

Custom Graphic Design

• Professional app icon design
• App Store screenshots
• Marketing materials
• Promotional graphics
• Starting at $99

⚙️ Advanced Customization

• Add new features
• Integrate third-party services
• Custom calculator types
• Backend integration
• Analytics setup
• Hourly rate: $75/hour

App Store Upload Service

• Complete App Store submission
• Metadata optimization
• Screenshot preparation
• Review management
• One-time fee: $149

Priority Support

• Direct email support
• Quick response time
• Technical guidance
• Best practices advice
• Monthly: $49

Contact Us
[email protected]
www.chatstickmarket.com
We typically respond within 24 hours.

License

This is a white-label template for resale. You can:

• ✅ Rebrand and sell as your own app
• ✅ Modify and customize freely
• ✅ Use for commercial purposes
• ✅ Create unlimited apps from this template

You cannot:

• ❌ Resell the source code as a template
• ❌ Share the source code publicly
• ❌ Remove copyright notices from code comments

Updates & Support

• ✅ Lifetime access to this version
• ✅ Comprehensive documentation
• ✅ Email support for setup questions

Future Updates: may be available separately. Check our website for new versions. Existing customers receive discounts on updates.

⭐ Customer Testimonials

“This template saved me months of development time. The code quality is excellent and the documentation is thorough. Highly recommended!” — App Developer

“I was able to customize and launch my own circuit calculator app in just 2 weeks. The IAP integration worked perfectly out of the box.” — Indie Developer

“The Circuit Builder feature alone is worth the price. Very impressed with the attention to detail.” — Engineering Student

Bonus Features

• ✅ Step-by-step calculation explanations
• ✅ Engineering notation formatting (k, M, G, m, μ, n, p)
• ✅ Input validation and error handling
• ✅ Undo/redo support in Circuit Builder
• ✅ Auto-save functionality
• ✅ Haptic feedback
• ✅ Accessibility support

Getting Started

Quick Start (5 minutes)

1. Download and extract the project
2. Open in Xcode 15+
3. Change bundle identifier
4. Build and run

Full Customization (1–2 hours)

1. Update AppConfig.swift with your branding
2. Replace app icon and launch screen
3. Configure IAP product ID
4. Test all features
5. Submit to the App Store

Market Opportunity

• Electronics Education — expanding online learning
• Maker Movement — growing DIY electronics community
• Professional Tools — engineers need mobile calculation tools
• Student Demand — engineering students need study aids

Low Competition • High Value

• Few comprehensive circuit calculator apps
• Many existing apps are basic or outdated
• Professional users are willing to pay for quality tools

✅ Quality Assurance

• ✅ All calculations verified
• ✅ Tested on iPhone and iPad
• ✅ iOS 16, 17, and 18 compatible
• ✅ Dark mode fully supported
• ✅ No memory leaks
• ✅ Smooth performance
• ✅ App Store guideline compliant

Success Tips

• Customize thoroughly — make it truly yours
• Invest in screenshots — strong visuals improve conversion
• Highlight premium value — calculators + builder + export
• Competitive pricing — test $4.99–$9.99
• Ship updates — keep users engaged
• Respond to reviews — build trust and community
• Market smart — share on engineering forums & communities

❓ Pre-Sale Questions?

Have questions before purchasing? We’re here to help.
[email protected]

Why Buy From Us?

• ✅ Professional, maintainable codebase
• ✅ Comprehensive documentation
• ✅ Responsive support
• ✅ Fair pricing and strong value
• ✅ Regular updates and improvements

Special Launch Offer

Limited-time bonus for the first 50 buyers:

• ✅ Free app icon design ($99 value)
• ✅ 30-day priority email support ($49 value)
• ✅ App Store submission checklist
• ✅ Marketing tips guide

Purchase Now

Ready to launch your own circuit calculator app? Get started today and publish within weeks.

Contact & Support
[email protected]
www.chatstickmarket.com
⏰ Response Time: Within 24 hours

Circuit Calculator — Transform this premium template into your own branded success story!