> I’m trying to learn ways to minimize my reliance upon large companies for handling my day-to-day personal data. Except that the moment you "share them across devices", at least one large company will silently grab your contacts anyway. And several others will try to, too, with one excuse or another.
Why would anyone get your contacts if you sync them via your own CarDav server? You don't need to sync them to iCloud / Siri on iOS, and you can use non-Google Android phones.
Whatever you're using to sync contacts, without syncing them to this contact app, it seems (to me) as useful as keeping a textfile full of phone numbers in Dropbox. You won't have any useful prompts telling you that it's Dave phoning you, John texting you, or Alice's number to phone/text.
This is, admittedly, neatly worked around by keeping your permission requests under control, but... stuff like this[1], from before the granular permission system on Android was available, are annoying.
1: http://bgr.com/2011/08/12/facebook-stole-every-contact-and-p...