How we research

Where our figures come from

We start with each product's own page on the maker's site, then authorized retailers. Every specification on a product page comes from that published information, and we check each quoted figure against it.

If a maker doesn't state something, we write “not stated” instead of estimating it.

Conflicts and changes

Makers sometimes publish two different figures for the same product. We show both, say where each came from, and never pick the more flattering one silently.

Prices and subscription plans change often, so we re-check them regularly. Always confirm the current price with the seller before you buy.

What we don't do

• We don't publish ratings or scores we didn't calculate from a stated method.
• We don't accept payment to include or rank a product.

Our calculations

Calculations are labelled “Felineering math” and show their formula, inputs and assumptions.

Updated October 2026.