# GridMix — Know Your Footprint > Visualize and forecast regional electricity CO₂ emissions for cleaner energy use. (iPhone/iPad app by John Chaykowsky.) - Source: https://appshunter.io/ios/app/gridmix/id6751874047 (this page in markdown: same URL + `.md`) - Developer: [John Chaykowsky](https://appshunter.io/developer/1837354833) - Category: Utilities - Price: Free (on sale, was $0.99) - Rating: 5.00/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 16.2 · 97 MB - Languages: American English - Released: 2025-09-05 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gridmix/id6751874047/reviews.md ## What is GridMix? Electricity isn’t equally clean every hour. This app shows your region’s live CO₂ and a 24-hour forecast so you can act when energy is cleanest. About to charge your EV or start the dryer? If the curve drops in an hour, wait and cut your emissions—no guesswork. Simple timeline, clear numbers, smarter choices. Know when your electricity is cleanest. Open the app and the gradient color tells the story in a glance: lighter green means cleaner power right now; darker tones mean it’s dirtier. No menus. No jargon. Just a quick read on your impact. For more detail, see the exact numbers: • MOER — the Marginal Operating Emissions Rate: the extra CO₂ emitted if one more megawatt-hour is used right now. Shown in lbs CO₂/MWh, it’s the most actionable way to time charging and appliances. • Fossil % — the share of your grid currently powered by fossil fuels. Plan smarter with a 24-hour forecast for your region. If emissions drop in an hour or two, you’ll see it, so you can delay EV charging, laundry, or heating/cooling to a cleaner window. Built on trusted public data. The app combines reliable datasets (U.S. EIA grid operations and EPA emissions) with robust statistical modeling. Data are refreshed throughout the day, so shifts in demand are captured in near real-time. Location-aware, nationwide coverage. We use your current location to map you to your Balancing Authority (BA) so you’re seeing the electricity you actually consume. The majority of major U.S. BAs are supported. Why you’ll love it • At-a-glance color gradient for “clean vs. dirty” right now • Current MOER (lbs CO₂/MWh) and Fossil % on your grid • 24-hour emissions forecast to pick the greenest hour • Near real-time updates as conditions change • Clean, minimal design—open, check, decide What’s next: widgets, notifications when low-emission hours are coming, a watchOS app, and more. Make timing your climate superpower. See when your energy is cleanest and act on it. ## Key features - Live CO₂ emissions visualization - 24-hour emissions forecast - Marginal Operating Emissions Rate (MOER) - Fossil fuel percentage on grid - Location-aware coverage - Near real-time updates ## Frequently asked questions about GridMix ### What is GridMix? GridMix is a free utility app that shows your region's live CO₂ emissions and a 24-hour forecast. It helps you time your energy usage for when electricity is cleanest. ### How does GridMix help reduce my carbon footprint? By showing you when your electricity is cleanest, GridMix allows you to delay high-energy tasks like EV charging or laundry to periods with lower CO₂ emissions, directly cutting your impact. ### What data does GridMix use? GridMix is built on trusted public data from the U.S. EIA grid operations and EPA emissions, combined with statistical modeling. Data are refreshed throughout the day for near real-time accuracy. ### Does GridMix have ads? No, GridMix does not contain advertisements. It is a completely free and ad-free application. ### What is MOER in GridMix? MOER stands for Marginal Operating Emissions Rate. It's shown in lbs CO₂/MWh and represents the extra CO₂ emitted if one more megawatt-hour is used right now, providing an actionable metric for timing energy use. ### What regions does GridMix cover? GridMix offers nationwide coverage in the U.S. It uses your current location to map you to your specific Balancing Authority (BA), supporting the majority of major U.S. BAs. ### How often is the data in GridMix updated? The data in GridMix is refreshed throughout the day, capturing shifts in demand in near real-time. This ensures you are always seeing the most current information about your grid's emissions. ### What devices can I use GridMix on? GridMix is available for iPhone and iPad devices. It has an age rating of 4+. ## Version history (last 5 releases) ### 1.5 — 2026-01-30 Bug Fixes ### 1.4 — 2026-01-29 Bug fixes ### 1.3 — 2026-01-28 • Best/Worst Times card - See optimal windows for clean energy usage • Smart Notifications - Get alerted 30 minutes before low-emission periods • Faster startup with improved location caching • Updated MOER emissions data ranges for all regions ### 1.2 — 2025-10-04 Added relative MOER for each region with corresponding colorscale changes ### 1.1 — 2025-09-08 • Checks for users outside of available balancing authorities ## Apps similar to GridMix | App | Rating | Price | Category | | --- | --- | --- | --- | | [Self: Human & Agent Identity](https://appshunter.io/ios/app/self-human-and-agent-identity/id6478563710) | 4.3 (22) | Free | Utilities | | [dewenwils](https://appshunter.io/ios/app/dewenwils/id1592274178) | 4.7 (225) | Free | Utilities | | [MetaPrint](https://appshunter.io/ios/app/metaprint/id1658472254) | 1.8 (48) | Free | Utilities | | [Reclaim Verifier](https://appshunter.io/ios/app/reclaim-verifier/id6503247508) | — | Free | Utilities | | [Home Configurator](https://appshunter.io/ios/app/home-configurator/id1525371546) | 3.8 (11) | Free | Utilities | | [Tempo - Color of the day](https://appshunter.io/ios/app/tempo-color-of-the-day/id6477762090) | — | Free | Utilities | --- *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 2026-06-11.*