# GenCheck — Universal Generator Calculator > Generator capacity calculator and safety guide for power outages. (iPhone/iPad app by Kevin Donahue.) - Source: https://appshunter.io/ios/app/gencheck/id6756020124 (this page in markdown: same URL + `.md`) - Developer: [Kevin Donahue](https://appshunter.io/developer/1838283089) - Category: Utilities, Reference - Price: $3.99 with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 17+ - Requires: iOS 17.6 · 4 MB - Languages: American English - Released: 2025-12-17 - Data updated: 2026-06-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gencheck/id6756020124/reviews.md ## What is GenCheck? POWER WHAT MATTERS GenCheck helps homeowners safely manage generator capacity during power outages. Know exactly which devices your generator can power, avoid dangerous overloads, and follow critical safety guidelines—all in one professional app that works with any gas, propane, solar, or electric battery inverter generator.  The innovative 'Storm Safe' mode ensures the app always works, even without an internet connection! Fuel Load shows how long your generator will run under load. Don't face an outage without it. PERFECT FOR: Hurricane & storm preparation Power outage planning First-time generator owners Emergency preparedness Homeowners in Florida, Louisiana, Texas, the Gulf Coast, the Bahamas, Puerto Rico, Mexico, and storm-prone regions KEY FEATURES Guide Me Mode - Step-by-step wizard walks you through generator setup, cord safety, device selection, and critical safety reviews. Perfect for occasional users and storm preparation. Storm Safe Mode - Fully functional with or without an internet connection. Don't rely on an app that won't work when your wifi is disconnected! Generator Database - Choose from hundreds of the most popular generators from Honda, Generac, Champion, Westinghouse, Predator, Anker, Jackery, and more. Model not listed? Enter custom specifications for any model: track running watts, peak watts, and fuel type. Device Library - Select from dozens of pre-loaded household items, appliances, and tools with accurate wattage ratings. Add custom devices with ease. Track quantity for multiple items. Real-Time Capacity Monitor - See instant feedback on your generator's capacity usage and remaining fuel time. Visual gauges show running load and startup surge requirements. Get immediate warnings if you exceed safe limits. SAFETY CHECKLISTS Comprehensive safety protocols covering: Pre-operation checks Safe starting procedures During operation monitoring Proper shutdown steps Storage & maintenance CRITICAL SAFETY FEATURES Carbon monoxide poisoning prevention Backfeed electrocution warnings Proper positioning guidelines (20+ feet from home) Extension cord capacity requirements GFCI protection education Refueling safety protocols EMERGENCY RESOURCE LINKS CDC Generator Safety Guidelines FEMA Disaster Assistance National Weather Service National Hurricane Center Electrical Safety Foundation Emergency contact numbers PERSONALIZED CONFIGURATIONS Create and save multiple setups for different scenarios: Hurricane evacuation Extended power outage Winter Storm Mode Essential devices only Full home backup STORM RELIEF During emergencies, redeem offer codes for extended free access. We support affected communities when they need it most. AFFILIATE LINKS This app includes affiliate/commission links for products we recommend. If you choose to purchase through these links, we may earn a commission at no additional cost to you. WHO NEEDS GENCHECK? If you've ever asked yourself: "Can my generator handle my refrigerator AND my AC?" "Am I operating my generator safely?" "What's the difference between running watts and starting watts?" "How do I prevent carbon monoxide poisoning?" "Which devices should I power first?" GenCheck provides clear, professional answers backed by official safety guidelines from CDC, FEMA, and OSHA. EDUCATIONAL & INFORMATIVE GenCheck is designed as an educational tool, not a replacement for professional assessment. Always consult: SUBSCRIPTION DETAILS 3-day free trial $3.99/year after trial Cancel anytime Storm relief codes are available during emergencies No credit card required for trial STORM SEASON READY Winter Storm Season runs December 1 - March 30. Atlantic Hurricane Season runs June 1 - November 30.  Download GenCheck before the next storm to ensure you're prepared. Join thousands of homeowners who power what matters safely. Support, Privacy, FAQs: https://www.gencheck.com Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Generator setup wizard - Offline 'Storm Safe' mode - Extensive generator database - Household device wattage library - Real-time capacity monitoring - Safety checklists and guidelines - Personalized scenario configurations ## Pricing and in-app purchases Base price: $3.99. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | GenCheck Annual | $3.99 | per year | ## Frequently asked questions about GenCheck ### What is GenCheck? GenCheck is a utility app designed to help homeowners manage their generator capacity safely during power outages. It allows users to calculate which devices their generator can power, avoid dangerous overloads, and access critical safety information. ### How much does GenCheck cost? GenCheck is a paid app priced at $3.99. There is also an optional 'GenCheck Annual' subscription plan available for $3.99 per year, which includes a 3-day free trial. ### Does GenCheck work offline? Yes, GenCheck features an innovative 'Storm Safe' mode that ensures the app remains fully functional even without an internet connection, making it reliable during power outages when Wi-Fi may be unavailable. ### What generators are supported by GenCheck? GenCheck supports hundreds of popular generator models from brands like Honda, Generac, Champion, and more. If a specific model is not listed, users can enter custom specifications for any generator. ### What safety features does GenCheck offer? GenCheck provides comprehensive safety protocols, including carbon monoxide poisoning prevention, backfeed electrocution warnings, proper positioning guidelines, extension cord capacity requirements, and refueling safety protocols. ### What devices can I add to GenCheck? The app includes a library of dozens of pre-loaded household items and appliances with accurate wattage ratings. Users can also easily add custom devices and specify quantities for multiple items. ### What is the age rating for GenCheck? GenCheck has an age rating of 17+, indicating it is intended for mature users due to the nature of electrical safety and generator management. ### How often is GenCheck updated? The latest version of GenCheck is 1.1, which was last updated on December 18, 2025. Updates typically focus on improving functionality, expanding the device and generator databases, and enhancing safety features. ## Version history (last 2 releases) ### 1.1 — 2025-12-18 * More than 200 electric, gas, propane, and solar battery generators pre-loaded in the Generator Database * Fuel estimates now estimate run time under configured load * Top Rated Generators displays highly recommended models ### 1.0 — 2025-12-17 No release notes. ## More apps by Kevin Donahue - [Retirement Success Graph](https://appshunter.io/ios/app/retirement-success-graph/id6752217522) - [Rennch](https://appshunter.io/ios/app/rennch/id6758914523) - [90 Days in Europe Schengen](https://appshunter.io/ios/app/90-days-in-europe-schengen/id6760942326) All apps by Kevin Donahue: https://appshunter.io/developer/1838283089 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*