GridCarbon vs Bright
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.
Bright
Track your electricity and gas usage in real-time from your smart meters. This app helps you manage energy consumption and spend more efficiently, contributing to carbon reduction goals. Requires compatible hardware for full functionality.
- Real-time energy consumption monitoring
- Electricity and gas usage tracking
- Smart meter data access via DCC or CAD
- Clamp-on sensor support for electricity
- Energy spend management
- Carbon efficiency goals
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Monitor your energy consumption anytime, anywhere with Bright. For real-time data you need Glowmarkt compatible hardware (https://shop.glowmarkt.com/) - which works with either smart or traditional meters. People with SMETS2 (or E&A SMETS 1) meters can access their half hourly data with Bright for free, once they go through our verification process. Bright lets you check your energy consumption, this could be electricity and gas usage from your smart meters, via the DCC or our Consumer Access Device (CAD). Clamp-on technology sensors can support electricity usage monitoring. Our goal is to help you manage your energy consumption and spend more efficiently as we all strive to become more carbon efficient. To see our Frequently Asked Questions go to: https://glowmarkt.com/#/faqs/apps For more information or any questions please contact: support@glowmarkt.com Join the Glow community (https://forum.glowmarkt.com/).
Screenshots
Verdict
The clearest difference is rating: Bright at 5.0 against GridCarbon's 3.2. GridCarbon's advantage is review sentiment (76% vs 51%) and ratings volume (6 vs 1). 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.
Bright holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: GridCarbon has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 76% of GridCarbon's written reviews are positive against 51% of Bright's, so the app with the better star average is not the one people write more warmly about.
GridCarbon ships an update every 4 months, Bright every 2 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | GridCarbon | Bright |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.7% of reviews — better | 50.7% of reviews |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | HILDEBRAND TECHNOLOGY LTD |
Customer experience
GridCarbon
Bright
Bugs and requests
GridCarbon
Not enough reviews yet to summarise bugs or requests.
Bright
Reported bugs
28 issues- App crashes
- Data not loading
- Login issues
- Registration errors
- Password reset emails not received
Show 23 moreShow fewer
- Graphs too tall for screen
- Inconsistent billing data
- App stopped working
- Tariff information outdated
- Login issues with password managers
- Slow data loading
- Gas cost not showing
- Comparison views broken
- Font changed to Times New Roman
- Doesn't remember login
- App won't load anything on iOS 15.3
- Duplicate meters showing
- Server outage caused no data
- Smart meter display not recognized
- Authentication details not sent
- Login button not clickable until character re-typed
- Comparison views broken
- Gas Tariff not found
- App won't work on IOS 15.3
- Doesn't remember login
- Login button not clickable until character re-typed
- Gas Tariff not found
- App won't work on IOS 15.3
Requested features
8 requests- Export data (CSV)
- More data analysis
- iOS widget
- Support for dual-rate electricity tariffs (Economy 7)
- Apple Watch version
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- Ability for customer to override incorrect supplier data
- Face-ID login
- Live gas usage in graphical fashion
In-app purchases
GridCarbon
No in-app purchases
Bright
No in-app purchases








