Source policy
Product facts change quietly. This page sets out where ours come from and how we behave when we cannot source something.
Last updated 11 August 2026
Source hierarchy
- 1The vendor’s own pricing or feature pagePreferred for anything about what a product costs or does.
- 2Official app-store listingUsed for platform availability, in-app purchase pricing and current version.
- 3The vendor’s published documentation or privacy policyUsed for data handling and bank-connection behaviour.
- 4A primary company announcementUsed for changes that are not yet reflected on the main site.
- 5High-quality secondary reportingUsed only where no primary source exists, and always attributed.
Rules we hold ourselves to
- An AI answer is never a source. Nothing on this site is sourced from a language model’s output, including our own.
- Unknown beats invented. A fact we cannot confirm is recorded as unknown and shown as “not verified”. It is never filled in to make a comparison table look complete.
- Citations live with the data, not the prose. Source URLs and check dates are attached to the record in our feature matrix, so a fact and its provenance cannot drift apart.
- We do not convert currencies. A price quoted by a vendor in USD is shown in USD. Converting it would silently invent a number that changes daily.
- A build is not a verification. Deploying this site does not update any “last checked” date. Those dates move only when a person checks something.
Where we are currently weak
We hold a primary pricing source on file for only a minority of the products we cover. For the rest, prices are shown as indicative and flagged as unsourced on the product page. We would rather tell you that than present eighteen equally confident numbers.
See the methodology page for how missing data affects a product’s score and whether it is ranked at all.