Warning: Use this only if official Windows options are unavailable. Avoid entering sensitive account credentials in untrusted environments.
To add to the confusion, there is a software utility called for Windows. This is a lightweight, legacy tool (usually found buried on the customer support page) used exclusively to manually flash firmware via USB cable on older devices like the IQOS 2.4 Plus or IQOS 3.0.
Typical search results for “IQOS app Windows download” lead to: