Great app. Works very reliably. The recent sync issues got fixed very quickly. Good job!
Updated 6/28/17, now will not authenticate after no problems for 2 years
Not sure how this app works but does what it is supposed to do. However I have noticed that Google Maps won't search contacts synced with this app. Would be good if this facility worked too. Update: An almost immediate response from the developer. Fantastic service, they actually try to resolve issues. Hopefully they can find a solution.
Great app, but displays an certificate error on connection problems and then crashes Reported but still not fixed.. wonder if the app is still supported
It is unfortunate that with all the resources Google has at their disposal, they still cannot justify adding support for the vCard Extensions to WebDAV ("CardDAV") Internet Standard... But this is where CardDAV-Sync comes in. Not only does CardDAV-Sync fill an un-necessasary void, but the application looks great and thus far, has worked flawlessly for me. If you're an Android user and you need support for CardDAV, then look no further than CardDAV-Sync!
If you uninstall the app, your phone will lose all contacts, they'll only remain on the account you *thought* were synchronized with Android's Contact thus your Google account. This is not sync!! contacts don't exist in BOTH places, they only *appear* as such so long as the app is installed. That's extremely counter-intuitive. Really not the behavior you'd expect (with real sync, you'd expect contacts to remain "as is" on both sides if you cut the link... Not so with CardDAV). I lost a bunch of contacts because of that, it was a bug due to my mail provider but this CardDAV sync app did not cover me as I thought it would: no real sync. I strongly advise against using it, or know that it's not real sync, your contacts only exist in one place and will be wiped out of your phone if you uninstall this app. Why, I have no idea, but it's the worst behavior for a "sync" app to make you dependent on using said app and said app only to retain the apparent (but not real) sync functionality. I'll move to another solution asap.
Fix authentication issues
#1 Contacts manager: transfer, backup, sync, sharing & Dialer for professionals
Making CalDAV/CardDAV great again! Contact/calendar/task/iCloud synchronization