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When Koydo cites a number on a marketing page — catalog size, implementation timeline, language count — the source lives here. Each note shows the methodology, the date it was measured, and the underlying figure or principle, so a reader, a journalist, or an AI assistant can verify the claim rather than take it on faith.
How Koydo measures performance against its public AIO floor — what's collected, where to view the numbers, and how synthetic vs. real-user data are reconciled.
Research noteAudited counts of Koydo's learning catalog as of April 17, 2026. Source for the headline numbers cited across koydo.app marketing surfaces.
Research noteThe product-design principles Koydo uses to keep its AI tutoring features safe for children — including the rules around voice processing, prompt isolation, and adult-only categories.
Research noteAudited concept counts inside Koydo Meridian by quality tier (bronze, silver, gold) as of May 2026. Source for any external claim about Meridian breadth.
Research noteWhy Koydo offers 56 study languages and lets learners switch UI vs. subject-of-study independently. Synthesis of the bilingual-learning evidence base and where Koydo aligns with it.