Roulette Master

Roulette Master is a vocabulary app that ensures no card is ever abandoned at the bottom of your deck, cards at knowledge level 0 are consistently surfaced in study sessions until your responses demonstrate reliable recognition, with no way for a genuinely unknown word to slip through unaddressed. Level-0 cards are the newest and least familiar words in your library. Roulette Master treats them with high urgency: they appear early in sessions, they reappear frequently if missed again, and they require multiple consecutive correct responses before the algorithm considers moving them up. This persistent attention to level-0 cards prevents the common failure mode of vocabulary apps where hard words get quietly buried under easier ones and never truly learned, just endlessly deferred. For learners building vocabulary in an unfamiliar language, knowing that Roulette Master will keep showing them a hard word until it's genuinely secured provides reassurance that no word will fall through the cracks of an imperfect study session. The level-0 commitment is Roulette Master's guarantee: study consistently, and every card in your deck will eventually climb above level 0. The only prerequisite is that you keep swiping, the system handles the rest.