Download MSKgestion only from the official MSKconnecT website or the listed app store links. This keeps you away from modified APK files shared through messaging apps.
On Android, use the download page and follow your phone instructions. If Android asks you to allow installation from this source, approve only when the file came from the official MSKconnecT page.
After installation, open MSKgestion from your home screen, create your business profile, then add your first products before recording sales.
If iOS is marked as coming soon, the iPhone version is not publicly available yet. Do not trust third-party links that claim otherwise.