The principles behind every IndexFair rating — the same across every market we cover.
IndexFair is an independent analytical layer over public consumer reviews and first-party product measurement. We don't host reviews, we don't take payment to change a score, and we publish the framework. Each market has its own detailed methodology; this page is what they all share.
Every IndexFair score is a single number from 0 to 10, attached to one brand, in one market, in one country. It is the deterministic output of a versioned formula: given the same inputs and the same methodology version, the same number reproduces.
Each score carries a ± confidence interval and a percentile against the brand's market. A wider interval means a smaller or more divided evidence base. Where the evidence is too thin to be fair, we withhold the number rather than publish one at low confidence.
Six principles shape every score, in every market:
We read real user reviews across app stores, social and community platforms, review sites, and specialist pages — never the marketing copy. The source mix is continuously re-evaluated and is not fully published, so no single feed can be flooded to move a score.
Every review passes a deterministic filter — duplicate fingerprints, posting bursts, length and sentiment anomalies — before it can affect a score. Reviews that fail are excluded, and their count is shown openly on each brand page.
We independently estimate each brand’s real-world traffic and how its users arrive, as a corroborating signal: review sentiment that is not backed by a matching audience is trusted less.
Where a product can be measured directly, we measure it ourselves rather than take the operator’s word — and feed those facts into the score as their own block.
Evidence decays with age: a report from last month counts for more than one from three years ago, on a published half-life curve.
Small or divided samples are pulled toward the market average and carry a wider ± interval; below a minimum threshold a number is withheld rather than shown at low confidence.
Each market keeps these principles but adds its own scoring blocks, aspects, and weights. The detailed, versioned methodology for each lives on its own page:
Bookmakers and online casinos — the four-block composite (trust & compliance, user experience, operational signals, measured product), the per-aspect weights, and the full source and fake-review detail.
Read the gambling methodology →Exchange and wallet ratings — the same principles with a market-specific block and aspect set. Not yet live.
When a brand we rated highly later fails, our response is governed by a protocol we publish in advance — When we are wrong.