GridCarbon vs SoftKey
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.
SoftKey
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SoftKey allows authorised users to open doors using their smartphone via secure Bluetooth technology. Designed for apartment blocks, offices and managed properties, SoftKey replaces or complements traditional fobs and access cards with encrypted digital keys issued by an authorised administrator. Key Features: • Open doors using Bluetooth without requiring an internet connection • Secure Smart Keys issued by property administrators • Permanent, time-based, recurring, and one-time access permissions • Delivery mode with automatic expiry after first use • Activity logs and controlled user management • Simple and intuitive user experience SoftKey works with Entryphone hardware and can also integrate with most third-party door entry and access control systems that support a standard volt-free relay or trigger input.
Screenshots
Verdict
The clearest difference is ads: GridCarbon at none against SoftKey's shown. On price, update cadence, in-app purchases and device support 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.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.
| Parameter | GridCarbon | SoftKey |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (6 ratings) — better | — |
| Positive reviews | 75.7% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | ENTRYPHONE COMPANY LIMITED(THE) |
In-app purchases
GridCarbon
No in-app purchases
SoftKey
No in-app purchases









