How it works
Study Mode uses spaced repetition: a review schedule that spaces a question further apart each time you get it right, and pulls it back sooner when you don't. It's the same underlying idea as SM-2, the algorithm behind Anki.
There are no self-rating buttons. Every question already has a correct answer, so the grade comes from the answer itself — whether you got it right and how quickly you answered — and the next review is scheduled automatically. Symbol and name cards ask you to type the answer (recalling it counts for more than recognising it), with the choices one tap away; a card you miss comes back once before the session ends (up to five per session).
A question counts as "due" only after you've seen it once and its scheduled review has come around. Anything you haven't studied yet is new, not due — an empty due queue means you're caught up, not that there's nothing left.
What's inside
439 questions across 26 units, in five levels that build on each other:
Elements Come Alive — symbols, names, and real-world uses for the 20 elements every first-time chemistry student needs.
Foundations of Chemistry — groups and periods, ion formation, periodic trends, and polyatomic ions across 56 elements.
AP/IB Chemistry Exam Prep — electron configurations, periodic-trend reasoning, stoichiometry, thermochemistry, equilibrium, acids and bases, and electrochemistry in exam question style.
College General Chemistry — Hess's Law, equilibrium, Gibbs free energy, reaction kinetics, and ACS-style multi-concept questions.
University & Research — NMR spectroscopy, biochemistry, crystal field theory, and advanced bonding.
Every unit has a lesson companion — a short activity write-up, not just a stack of questions. Some cards use the periodic table itself: instead of picking an answer from a list, you tap the tile where the element lives.
Sessions come in four shapes: Quick 5 for a spare
minute, Standard for a full sit-down,
Due only when you just want to clear your reviews, and
Weak topics, which drills the two topics you are
shakiest on.
Who it's for
- Students building recall for quizzes, tests, and finals.
- AP and IB students prepping with exam-style questions.
- Teachers assigning practice — no accounts or gradebook to set up, students just open the link.