Comparison

GridCarbon vs PhaseXpert

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

PhaseXpert

Features
Read full description

PhaseXpert is an engineering application for calculating thermodynamic and transport properties of CO₂ and supported CO₂-rich mixtures. Designed for engineers, researchers and professionals working with carbon capture, transport and storage, PhaseXpert combines practical calculation tools with transparent scientific traceability. With PhaseXpert you can: - Calculate density, viscosity, molar mass, specific volume, compressibility factor and other supported properties. - Define custom CO₂-rich mixtures using common impurities such as N₂, O₂, Ar, CH₄, H₂, CO, H₂S and H₂O. - Explore phase behaviour and phase diagrams. - Save and reuse calculation cases. - Access built-in representative CCS compositions. - Compare multiple cases side by side. - Run property sweeps across pressure and temperature ranges. - Export calculation results for further analysis and documentation. - See when a property and operating state are supported by independent experimental validation evidence. - Explore validated reference cases directly from the Saved Cases section. PhaseXpert clearly separates calculation from validation. General Properties provides the primary engineering calculations, while the Validation layer identifies specific compositions, properties and operating ranges for which independent experimental evidence is available. The app also provides information about the IFE Model, a proprietary thermodynamic model currently under development by IFE Flow Technology and supported by experimental work, including measurements in IFE’s FALCON CO₂ facility. PhaseXpert includes English and Norwegian interfaces and is designed for practical engineering use on iPhone. Important: PhaseXpert is an engineering support tool. Users remain responsible for verifying results and determining their suitability for safety-critical, design, regulatory or commercial applications.

Screenshots

GridCarbon3 screens
PhaseXpert4 screens

Verdict

The call

The clearest difference is update cadence: PhaseXpert at every 10 days against GridCarbon's every 4 months. GridCarbon's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On price, 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

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

GridCarbon ships an update every 4 months, PhaseXpert every 10 days. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
GridCarbon versus PhaseXpert: the parameters behind the verdict, then further details
ParameterGridCarbonPhaseXpert
PriceFreeFree
Rating3.2 (6 ratings) — better—
Positive reviews75.7% of reviews—
Number of ratings6 — better—
Update frequencyEvery 4 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better18.0
Further details — not scored
Size10 MB17 MB
Age rating4+4+
DeveloperAlex RogersLuciano Patruno

In-app purchases

None

GridCarbon

No in-app purchases

None

PhaseXpert

No in-app purchases

Questions

Is GridCarbon free?
GridCarbon is free to download, with no in-app purchases.
Is PhaseXpert free?
PhaseXpert is free to download, with no in-app purchases.
Do GridCarbon or PhaseXpert have ads?
Neither GridCarbon nor PhaseXpert shows ads.
Which is updated more often, GridCarbon or PhaseXpert?
GridCarbon ships an update every 4 months, and PhaseXpert every 10 days. Most recently, GridCarbon was updated on October 7, 2026 and PhaseXpert on October 16, 2026.

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