UnoffIChO

An on-the-go revision app for chemistry olympiad preparation. It allows you to: classify reagents, and train calculations by building solutions from number tiles and formula operations.

Who made it

UnoffIChO is made by Yijun Wang, 2026 IChO gold medallist and IOAI bronze medallist, with interests in metal coordination complexes, AI alignment research and Greco-Roman literature.

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See what's new, and the reviewers who check the content.

unofficho.org