Because CheMax is "legacy" software (it hasn't changed its core design in years), many third-party "crack" or "repack" sites bundle it with unwanted adware.
There is a verified Android version (APK) available via platforms like Uptodown for those who want codes on their phone while playing on PC. skachat chemax rus 2017 skachat
You can find the desktop client for Windows (XP through Windows 10/11) on CheMax Download . Because CheMax is "legacy" software (it hasn't changed