Get the app that suits you
Last Update : 13 August 2017, at midnight ( Paris Timezone ).
Go to your WiFi settings of your iOS device, on settings app
Click on the "I" button to access to your personal WiFi settings
Replace numbers in the DNS section by 184.108.40.206, 220.127.116.11 like the following picture
Launch Clash, Royale and you should be connected to the server.