Tap −/+ to set coefficients until every atom balances. Live atom-tally shows your progress. Real chemistry engine!
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Starter
Simple 2–3 species reactions
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Balancer
Combustion, thermite, displacement
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NEET / JEE Redox
KMnO₄+HCl, Cu+HNO₃ — the big ones!
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6 equations per session · 45 s each (running out just moves you on) hints cost 5 pts · a failed CHECK costs 2 pts · lowest-terms bonus +5 ⭐⭐⭐ = balanced first try, no hint