Gmail -> ProtonMail free tier
Google Maps -> Open Street Maps (although I personally use Ordnance Survey Maps)
Google Docs -> I use LibreOffice because I don’t need the cloud functionality
Google Calendar -> I currently use a Synology NAS to host my own but I’m eagerly awaiting the release of Proton Calendar
As a disclaimer to this I actually pay for ProtonMail and OSMaps because they’re products I use daily and feel that they deserve the money, however they do have free tiers and there are free alternatives to most Google software. I’d strongly suggest looking into de-Googling, there’s an entire subreddit dedicated to it.
Literally every service the previous poster mentioned has an ad free/ tracking free alternative which ships with the iPhone. Aside from that, there are too many "free products" without advertising to list them so you'd need to be more specific.
> They are not free, if you need to buy a phone to use them.
If you don't have an iPhone/ iPad/ Mac, how else would Apple's privacy/ tracking policies apply to you?
We're talking about advertising and apps on iOS, those apps are absolutely free (and ad free) on any devices under discussion here. Otherwise, please feel free to ask about any other specific app on any other platform, because in almost all cases there is a free solution without advertising.
The idea that the world needs to run on advertising is nonsense. Likewise that developers/ end users somehow "need" advertising.