How We Research & Select

ReviewSifu guides are built from public, checkable information. We do not currently operate a testing laboratory, so we do not publish test scores, star ratings or "Best Buy" badges.

Source priority

1. Government, regulators, legislation and standards bodies.
2. Official brand websites, specifications, formal terms and published prices.
3. Major retailers and service providers, to confirm local availability and price ranges.
4. Credible media, research institutions and industry associations.
5. User experience and forums — as supporting signal only, never the sole basis for a conclusion.

How we shortlist

For a buying guide we define the market scope, set selection criteria based on what matters for that decision, and explain those criteria on the page. Recommendations describe who an option suits and its limitations — they are not endorsements of specific purchases.

When this becomes "How We Test"

If ReviewSifu builds real testing capability and a documented methodology in future, we will publish a separate How We Test page and label tested content clearly.