Chemy+ 2.2: ten improvements requested by people who use the app, plus optional Chemy+ Pro. • Undo and redo, clear the canvas with confirmation, and an eraser for atoms, molecules and cards. • Atoms grow under your finger when grabbed; they breathe and spark when they bond. • Single, double or triple bonds where you choose, and valence or oxidation state per atom. • Type a formula (NaHCO3) and choose: build it, see its synthesis route or predict with AI. • Educational organic synthesis up to aspirin, paracetamol and phenylephrine, with explained routes. • The keyboard dismisses when you touch the canvas and has a Done key; the canvas returns to full screen. • Chemy+ Pro (optional): unlimited canvases and AI predictions with no daily cap. Everything else stays free.

Living chemistry: build compounds by joining atoms, then break them, draw them and plan your way to them. • Valence builder: drop one atom onto another to form covalent, ionic or metallic bonds. Valence electrons orbit the atom you touch and a flash shows how they joined. • Real structures: every body in the Lab draws its skeleton with single, double and triple bonds, charges and ions. Change the charge or break the last bond. • Scissors: swipe across a bond to break it. Chemy+ tells you what it cost in energy and what is left: ions if the bond was polar, radicals if it was not. • Synthesis route: on any compound, "How to make it" traces the path from the elements in your palette and unfolds it on the canvas, step by step, with its conditions. • Write by hand: trace the formula with your finger or Apple Pencil, or draw an organic skeleton as lines and drop it into the Lab fully built. • Full periodic table: all 118 elements with search, families, electronegativity, configuration and melting and boiling points. • Activity series: bring sodium to silver oxide and it takes the oxygen. If the metal is not active enough, the Lab explains why and shows the series. • Organic chemistry: new reactions from methane and ethene to alcohols, aldehydes, acids, esters and aromatics, with functional groups and IUPAC names. • Acid-base with live pH and three indicators, states of matter by temperature, electrolysis and the Zn/Cu Daniell cell. • 50 challenges across five levels, with no points and no leaderboards.