# GridCarbon

> Track UK grid carbon intensity and generation mix in real-time. (iPhone/iPad app by Alex Rogers.)

- Source: https://appshunter.io/ios/app/gridcarbon/id346832866 (this page in markdown: same URL + `.md`)
- Developer: [Alex Rogers](https://appshunter.io/developer/346832869)
- Category: Utilities, Lifestyle
- Price: Free
- Rating: 3.17/5 from 6 App Store ratings · 37 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 10 MB
- Languages: English
- Released: 2010-01-04
- Data updated: 2026-06-08
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/gridcarbon/id346832866/reviews.md

## What is GridCarbon?

Track the carbon intensity of the GB electricity grid on your iPhone or iPad

Demand for electricity varies throughout the day, and thus, the mix of generators supplying this electricity continually changes. As a result, the carbon intensity of the electricity – the quantity of CO2 produced for 1 kWh of electricity consumed – also varies continually. Deferring your use of electricity to off-peak times, when the carbon intensity is low, can help reduce your carbon footprint.

Features:

- Data updated every 5 minutes.
- Display of instantaneous carbon intensity (gCO2/kWh).
- Traffic light indicator to highlight period of low and high carbon intensity.
- Generation mix summary showing total and percentage supply by type.
- Line plot showing carbon intensity over the previous 24 hours.
- Interactive bar chart showing the generation mix over the previous 24 hours.

## Key features

- Real-time carbon intensity updates
- Traffic light indicator for intensity levels
- Generation mix summary
- 24-hour carbon intensity plot
- Interactive generation mix chart

## Recent user reviews (10 of 37)

All indexed reviews: https://appshunter.io/ios/app/gridcarbon/id346832866/reviews.md

### 4/5 — Good

*2025-08-29, version 1.16.0*

Good app. Like the landscape mode with toggles for each type of energy source. Would be good to have demand displayed as well.

### 5/5 — Really useful

*2024-06-05, version 1.15.0*

I use this to plan my discretionary electricity use such as washing machine. Also interesting to see the constantly hanging mix of power generation. Very grateful to the app developers for what they have done.

### 2/5 — App no longer updating?

*2023-03-21, version 1.11.0*

Was a great app but seems to have stopped updating?

### 4/5 — Stopped working

*2023-03-21, version 1.11.0*

Excellent App and really useful and simple to share with others what the grid Carbon intensity is. However stopped working a week ago and data no longer available.

### 4/5 — almost perfect

*2022-08-26, version 1.11.0*

does one thing really well
one “nice to have”: it would be great if the total would collapse or scroll up when scrolling up the source list, to fit more entries on the display
great app!

### 3/5 — Doesn’t show graph

*2022-08-13, version 1.11.0*

Gives nice snapshot but no graph over time.

### 3/5 — Can’t see the graphs

*2022-08-08, version 1.11.0*

This app looks brilliant but I can only see the first page. How do you get onto the line and bar charts? Thanks.

### 5/5 — Great UK grid carbon intensity in real time

*2021-10-26, version 1.9.2*

This is great app. I rely upon it to decide when to run my appliances and large electrical loads. So that I limit my impact somewhat.

### 4/5 — Archived data

*2021-09-30, version 1.9.2*

Great APP but would be a fantastic one if archived data could be accessed

### 1/5 — Stopped working

*2021-07-26, version 1.9.1*

This app has stopped updating over the last few days, so right now is useless. 26/7/2021

## Frequently asked questions about GridCarbon

### What does GridCarbon do?

GridCarbon allows you to track the carbon intensity of the UK electricity grid in real-time. It shows you how much CO2 is produced per kilowatt-hour of electricity consumed, which varies based on the mix of power generators being used.

### How does GridCarbon help reduce my carbon footprint?

By displaying the carbon intensity of the grid, the app helps you identify periods when electricity generation is cleaner. You can then choose to defer energy-intensive tasks to these off-peak times, thereby reducing your overall carbon footprint.

### How often is the data updated?

The carbon intensity data is updated every 5 minutes, ensuring you have access to the most current information about the UK electricity grid's environmental impact.

### What information is available on the generation mix?

The app provides a summary of the generation mix, detailing the total and percentage supply from different types of generators. It also features an interactive bar chart showing this mix over the previous 24 hours.

### Is GridCarbon free to use?

Yes, GridCarbon is a free application. There are no in-app purchases or subscription fees required to access its features.

## Version history (last 5 releases)

### 1.16.1 — 2026-05-12

Fixed typo.

### 1.16.0 — 2025-02-28

Updated Sheffield Solar API and added Greenlink interconnector.

### 1.15.0 — 2024-05-08

Update to use the new Insights Solution API.

### 1.14.0 — 2024-01-03

Update to include the new Viking Link interconnector.

### 1.13.0 — 2023-05-05

Update to Sheffield Solar API.

## Apps similar to GridCarbon

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Octopus Watch](https://appshunter.io/ios/app/octopus-watch/id1490260614) | 4.0 (1) | $1.99 | Utilities |
| [Octopus Mate](https://appshunter.io/ios/app/octopus-mate/id6467269539) | — | Free | Utilities |
| [UK Power Tracker](https://appshunter.io/ios/app/uk-power-tracker/id6673884870) | — | Free | Utilities |
| [Octopus Energy Agile Watcher](https://appshunter.io/ios/app/octopus-energy-agile-watcher/id1499880851) | — | $0.99 | Utilities |
| [OctoTracker](https://appshunter.io/ios/app/octotracker/id6463722470) | — | Free | Utilities |
| [Gridwatch](https://appshunter.io/ios/app/gridwatch/id1553702520) | — | Free | Utilities |

## More apps by Alex Rogers

- [Cicada Hunt](https://appshunter.io/ios/app/cicada-hunt/id648038025)
- [CO2 Modeller](https://appshunter.io/ios/app/co2-modeller/id1037101261)

All apps by Alex Rogers: https://appshunter.io/developer/346832869

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*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 2026-06-08.*