Official first
Profiles prioritize official websites, App Store pages, Google Play pages and official category pages.
How the atlas reads the market.
Mandarin Atlas treats traffic, ratings and downloads as signals, not absolute truth. Every resource profile keeps source links and a last-checked date visible.
Traffic as estimate
Website traffic is framed as third-party directional data, not an official metric or guaranteed ranking.
Dates matter
Every public-data field carries a last-checked date so updates can be audited.
Do not hide uncertainty.
If an app store rating, install count, ranking or website-traffic figure cannot be verified reliably, the product should say so plainly. The goal is to help learners choose, not to manufacture false precision.