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.
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
423 questions across 24 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 54 elements.
AP/IB Chemistry Exam Prep — electron configurations, quantum numbers, solubility rules, oxidation states, and thermodynamics 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 three shapes: Quick 5 for a spare
minute, Standard for a full sit-down, and
Due only when you just want to clear your reviews.
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.