[Fairphone 1] ccxxx:
I use the one from f-droid.

If you want to try: https://owncloud.frickel.club

As I said, possibly because some TLS 1.2 ciphers are disabled on the server... I get this exception every time:

D/NativeCrypto( 2765): ssl=0x0 NativeCrypto_SSL_interrupt
E/GetRemoteStatusOperation( 2765): Connection check at https://owncloud.frickel.club: SSL exception
E/GetRemoteStatusOperation( 2765): javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x614ab4a0: Failure in SSL library, usually a protocol error
E/GetRemoteStatusOperation( 2765): error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure (external/openssl/ssl/s23_clnt.c:744 0x5df286fd:0x00000000)
E/GetRemoteStatusOperation( 2765): at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:448)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.network.AdvancedSslSocketFactory.verifyPeerIdentity(AdvancedSslSocketFactory.java:248)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.network.AdvancedSslSocketFactory.createSocket(AdvancedSslSocketFactory.java:185)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1361)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
E/GetRemoteStatusOperation( 2765): at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.OwnCloudClient.executeMethod(OwnCloudClient.java:222)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.OwnCloudClient.executeMethod(OwnCloudClient.java:192)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.resources.status.GetRemoteStatusOperation.tryConnection(GetRemoteStatusOperation.java:89)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.resources.status.GetRemoteStatusOperation.run(GetRemoteStatusOperation.java:194)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.operations.RemoteOperation.execute(RemoteOperation.java:136)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.operations.GetServerInfoOperation.run(GetServerInfoOperation.java:81)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.lib.common.operations.RemoteOperation.execute(RemoteOperation.java:136)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.services.OperationsService$ServiceHandler.nextOperation(OperationsService.java:478)
E/GetRemoteStatusOperation( 2765): at com.owncloud.android.services.OperationsService$ServiceHandler.handleMessage(OperationsService.java:413)
E/GetRemoteStatusOperation( 2765): at android.os.Handler.dispatchMessage(Handler.java:110)
E/GetRemoteStatusOperation( 2765): at android.os.Looper.loop(Looper.java:193)
E/GetRemoteStatusOperation( 2765): at android.os.HandlerThread.run(HandlerThread.java:61)
E/GetRemoteStatusOperation( 2765): Caused by: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x614ab4a0: Failure in SSL library, usually a protocol error
E/GetRemoteStatusOperation( 2765): error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure (external/openssl/ssl/s23_clnt.c:744 0x5df286fd:0x00000000)
E/GetRemoteStatusOperation( 2765): at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
E/GetRemoteStatusOperation( 2765): at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:405)
E/GetRemoteStatusOperation( 2765): ... 20 more

I also have another Android 4.4.2 device that can't connect at all and runs into a timeout with ipv6... *sigh*

But on android 5 it works fine.