How We Research

1. Annual Running Cost (Total Cost of Ownership)

Manufacturers publish purchase prices. They never publish what a product actually costs to own over its lifetime. We calculate an annual figure using a consistent formula:

Consumable costs (replacement blades, filters, bags, cartridges) are sourced from the manufacturer or the largest UK retailer at the time of writing. Energy costs use the current UK average unit rate (pence per kWh) and typical weekly usage patterns. All figures are in GBP and reviewed quarterly.

2. Real-World Performance vs. Spec-Sheet Claims

A robot mower's quoted coverage area is tested on flat, ideal terrain. An e-bike's stated range assumes a single speed on a flat road. We source real-world figures from forum consensus, independent YouTube reviewers, and specialist press tests — always using the most-viewed and most-cited sources for each product. Where we show a real-world figure, we also show the manufacturer's claim alongside it so the comparison is transparent.

3. App Quality Score

For connected products — robot mowers, pet trackers, exercise bikes, e-bikes — the companion app is often the deciding factor between otherwise identical products. No manufacturer spec sheet rates their own app. We produce a composite score (1.0–5.0) using this formula:

Forum sentiment is assessed on a 1–5 scale from dedicated subreddits and product forums, focusing on the word "app" in discussion threads. The source date is recorded in the ⓘ tooltip on the relevant table row.

4. Setup Time

“Box to working” time in minutes — how long it realistically takes to get a product running from scratch. We source this from the most-viewed YouTube unboxing or setup review for each product at the time of writing. This is particularly useful for high-complexity products such as robot mowers with perimeter wire, standing desk assembly, and solar generator setups. The video source is referenced in the ⓘ tooltip.