GridCarbon vs OctoTracker
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.
OctoTracker
Monitor daily and future energy prices for Octopus Tracker customers. Get real-time insights, plan consumption, and visualize price trends. Receive notifications and use widgets for easy access to energy rate information.
- Monitor today's and tomorrow's energy prices
- Real-time price insights
- Price indicator (above/below average)
- 30-day price visualization charts
- Compare rates with standard tariff
- Push notifications for price changes
- iOS home screen widget
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OctoTracker is the essential companion app for Octopus Tracker. This free and privacy-respecting app is your go-to tool for staying on top of today's and tomorrow's energy prices, ensuring you always make the most informed decisions about your electricity and gas consumption. With OctoTracker, effortlessly monitor prices, providing you with real-time insights that matter. The friendly user interface puts today's and tomorrow's energy prices at your fingertips, allowing you to plan your energy usage strategically. OctoTracker features an intuitive indicator that lets you know whether energy prices are above or below the average, allowing you to optimise your energy consumption and save money, all while reducing your environmental footprint. Visualise the last 30 days' prices for electricity and gas with interactive charts, allowing for a more in-depth analysis of energy price trends and compare rates with the standard (Flexible Octopus) tariff. Enable push notifications to receive timely updates on price changes, ensuring you get tomorrow's rates as soon as they're available, or use the iOS home screen widget to keep track of daily Tracker prices without even opening the app. Stay ahead of the curve and take control of your energy costs with OctoTracker. Unlock the power to make smarter energy choices, exclusively for Octopus Tracker customers! Say goodbye to energy price surprises and hello to financial control - OctoTracker has got you covered! NOTE: OctoTracker is an independent app and is not operated by Octopus Energy.
Screenshots
Verdict
The clearest difference is update cadence: OctoTracker at every 2 months against GridCarbon's every 4 months. On price, review sentiment, 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, OctoTracker every 2 months. Both last shipped on June 8, 2026.
| Parameter | GridCarbon | OctoTracker |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (6 ratings) — better | — |
| Positive reviews | 75.7% of reviews | 81.1% of reviews — better |
| Number of ratings | 6 — better | — |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | Jonathan Ellis |
Customer experience
GridCarbon
OctoTracker
In-app purchases
GridCarbon
No in-app purchases
OctoTracker
No in-app purchases









