Free font which is similar to Google Product Sans font, to be used in Android Application [on hold]

We would like to use "Google Product Sans font" in our app. However, we also notice that, it is not free according to https://fonts.google.com/license/productsans

Google offers many fonts under open source licenses. This is not one of them. Please see fonts.google.com for options you can use.

We would like to look for an alternative free font, which looks very similar to "Google Product Sans font", to be used in our Android application. Do you have any recommendation for that?

Thanks.