Tarc's core method — short daily lessons, spaced-repetition review, streaks, and gamified progress — is built to be language-agnostic, with Russian planned as a future addition alongside the existing Arabic and Latvian courses.
Nothing about daily lesson pacing or spaced repetition is specific to any one language; what changes per course is the content. For Russian, that content would center on Cyrillic literacy, the case system, and verb aspect as core early material.
Whenever the Russian course ships, it's expected to run the same way the existing courses do — directly in the browser at tarc.pro, with an Android app available too.
No — the plan is the same underlying app and method, just with Russian-specific course content.
No — it's expected to run in the same browser-based app (and Android app) already used for Arabic and Latvian.
No specific pricing has been announced, but Tarc's existing courses are free with only optional cosmetic in-app purchases.
Contact Tarc directly and mention Russian — there's no automated waitlist system yet.
See also: A Future Russian Course on Tarc · Learn Languages with Tarc · About Tarc