Comparison

GridCarbon vs SoftKey

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time carbon intensity updates
  • Traffic light indicator for intensity levels
  • Generation mix summary
  • 24-hour carbon intensity plot
  • Interactive generation mix chart
Features
Read full description

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.

About

SoftKey

Features
Read full description

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

GridCarbon3 screens
SoftKey4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
GridCarbon versus SoftKey: the parameters behind the verdict, then further details
ParameterGridCarbonSoftKey
PriceFreeFree
Rating3.2 (6 ratings) — better—
Positive reviews75.7% of reviews—
Number of ratings6 — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size10 MB27 MB
Age rating4+4+
DeveloperAlex RogersENTRYPHONE COMPANY LIMITED(THE)

In-app purchases

None

GridCarbon

No in-app purchases

None

SoftKey

No in-app purchases

Questions

Is GridCarbon free?
GridCarbon is free to download, with no in-app purchases.
Is SoftKey free?
SoftKey is free to download, with no in-app purchases.
Do GridCarbon or SoftKey have ads?
SoftKey shows ads; GridCarbon does not.
Which is updated more often, GridCarbon or SoftKey?
GridCarbon ships an update every 4 months, and SoftKey every 4 months. Most recently, GridCarbon was updated on October 7, 2026 and SoftKey on October 9, 2026.

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