Andrey Solovyev

This application is for students studying organic chemistry, for teachers and organic chemists. There are more than 180 structural formulas. Hydrocarb …

Do you know the structure of ammonia? Or hydrogen peroxide?Learn 200 chemical substances that are studied in introductory and advanced chemistry class …

Guess ALL 197 countries of ALL continents by their outline maps! From Europe and Asia to Africa and America. Pass the easy level of 50 questions to ge …

Выучите и запомните названия, расположение на карте, столицы и гербы всех субъектов Российской Федерации (85 субъектов согласно Конституции РФ: 46 обл …

Learn names and formulas of all important inorganic acids, polyatomic ions and their salts. An app is suitable for everyone: from high school students …

Learn all 26 cantons of Switzerland - from Zürich and Basel-Stadt to Geneva and Lucerne:* names of Swiss cantons* maps* capitals* coats of arms / flag …

Can you guess a famous scientist or a mathematician? Do you know why he or she is famous? Challenge yourself!More than 60 scientists from Ancient Gree …

The most important app for organic chemistry students includes 80 functional groups, the classes of organic compounds (hydrocarbons, ethers, esters, e …

Learn all 27 Regions of France: 22 in Metropolitan France (Normandy, Burgundy and others) and 5 overseas regions (French Guiana, Guadeloupe). From Bri …

Learn all 20 regions of Italy and their capitals: from Piedmont to Sicily, from Lombardy to Sardinia:* names* maps* capitals* Italian flags免費玩Italian …