GridCarbon vs Gridwatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GridCarbon
Monitor the real-time carbon intensity of the UK electricity grid. Understand how electricity generation sources change and identify times when using power is more environmentally friendly. Reduce your carbon footprint by shifting energy consumption to periods of lower grid emissions.
- Real-time carbon intensity updates
- Traffic light indicator for intensity levels
- Generation mix summary
- 24-hour carbon intensity plot
- Interactive generation mix chart
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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.
Gridwatch
Monitor real-time energy demand and electricity supply sources for the UK. Track current and past consumption levels to understand grid performance.
- Live UK energy demand metrics
- Electricity supply source breakdown
- Current consumption levels
- Historical consumption data
- Grid performance insights
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Get live energy demand metrics for the UK and from which sources the electricity is supplied to the grid. View current and historical consumption levels.
Screenshots
Verdict
The clearest difference is review sentiment: GridCarbon at 76% against Gridwatch's 67%. GridCarbon also leads on iOS requirement (12.0 vs 15.6). Gridwatch's advantage is device support (5 vs 3). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GridCarbon ships an update every 4 months, Gridwatch every 3 months. The most recent releases landed on June 8, 2026 and September 13, 2026 respectively.
| Parameter | GridCarbon | Gridwatch |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (6 ratings) — better | — |
| Positive reviews | 75.7% of reviews — better | 66.7% of reviews |
| Number of ratings | 6 — better | — |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV, Apple Watch — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 10 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | Carl de Wiele |
Customer experience
GridCarbon
Gridwatch
In-app purchases
GridCarbon
No in-app purchases
Gridwatch
No in-app purchases
