Kinda surprising, as many web-applications forget to add that meta-data after e.g. resizing photos. Still, not a good idea to upload pictures with GPS data to an online service (unintentionally).

iOS includes it by default.

It disappoints me that there apparently isn't an option on iOS to track photo location using some scheme other than EXIF. I really like being able to organize photos by location on my phone, but I dislike relying on image hosts and social networks to strip EXIF data when I post them to the web. Couldn't iOS store locations for photos it's taken out of band, in a sqlite db or something?

You can strip your own exif, there are many apps. Do not trust anyone else to do so, or not to keep that data for themselves even when they do. Cougfhaceboockough.

So iOS does it one way, Android does it another, and your old DSLR still stores data in EXIF? Sounds like a great way to be locked into a certain vendor.