# GridCarbon vs OctopusSwift

The clearest difference is price: GridCarbon at Free against OctopusSwift's $1.99. GridCarbon also leads on iOS requirement (12.0 vs 17.5). OctopusSwift's advantage is update cadence (weekly vs every 4 months) and review sentiment (100% vs 76%). On ads, in-app purchases and device support there is nothing between them.

GridCarbon is free to download; OctopusSwift costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GridCarbon ships an update every 4 months, OctopusSwift weekly. The most recent releases landed on June 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | GridCarbon | OctopusSwift |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.2 (6 ratings)](https://appshunter.io/ios/app/gridcarbon/id346832866/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 75.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 10 MB | 7 MB |
| Requires iOS | **12.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rogers](https://appshunter.io/developer/346832869) | [Dafydd Thomas](https://appshunter.io/developer/1816916265) |

## What reviewers say

### GridCarbon

[App page](https://appshunter.io/ios/app/gridcarbon/id346832866)

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:** macOS Compatibility

**In-app purchases:** none


### OctopusSwift

[App page](https://appshunter.io/ios/app/octopusswift/id6746445453)

Monitor your household's electricity usage and costs in real-time. See current and upcoming energy rates to identify the cheapest and most expensive times to use power, helping you save money and reduce environmental impact.

**Highlights:** Live electricity usage monitoring, Real-time cost estimates, Dynamic half-hourly rate display, Future rate forecasting, Identification of cheapest/peak times

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GridCarbon free?

GridCarbon is free to download, with no in-app purchases.

### Is OctopusSwift free?

OctopusSwift costs $1.99, with no in-app purchases.

### Do GridCarbon or OctopusSwift have ads?

Neither GridCarbon nor OctopusSwift shows ads.

### Which is updated more often, GridCarbon or OctopusSwift?

GridCarbon ships an update every 4 months, and OctopusSwift weekly. Most recently, GridCarbon was updated on June 8, 2026 and OctopusSwift on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*