I use LiChess on my blackberry Z30. BB 10 OS can use the android apk. Since LiChess added SSL certificates with
LetsEncrypt.org, BB OS less than 10.3.3 will also need the LetsEncrypt root certificates added or you will only be able to play locally and will see errors pop up like "request denied because of security". You can install the certificates manually using the instructions here:
http://jinoch.cz/lets-encrypt-certificates-and-blackberry.. or you can do it the easy way and use a BB application someone built to do that for you:
appworld.blackberry.com/webstore/content/59999147/