Works perfectly on all my family's devices. It's nice to be able to privatize/localize our calendar, tasks and contacts. Update: Keeps timing out on my Synology NAS's CardDAV server during authentication. I've had to employ another solution for now. I don't have any timeout problems with the app I'm using at the moment.
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
I used it to sync with daylite cardDav server ,but it can not sync picture of contacts ,how to solve this problem ?
I use davdroid now.
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.
Fix authentication issues
Making CalDAV/CardDAV great again! Contact/calendar/task/iCloud synchronization
#1 Contacts manager: transfer, backup, sync, sharing & Dialer for professionals