It's not better on Android or iOS either. If you want a smidge of privacy you may want to use a dumb phone but let's be clear : nowadays we are tracked like cattle.
There is another more involved approach that removes the connection altogether, instead of simply closing a valve between your data and Google.
Indeed, what may be alluring would be getting an easy-to-wipe phone (like a Nexus 5) and install a ROM (aftermarket OS) sans Google Play Services (the suite of apps on Android that hooks into Google's Cloud). If you were to do this, you would obtain many of the smartphone's advantages, but still be able to clearly control where your data goes.