By using the DigiTrains application you can control your whole layout from your phone or tablet via WIFI. From the locomotive library you can easily select the train to control. You can make unique photos as well. You can control the speed, direction and all functions from one screen with a touch or even with a gamepad while you can move all around the layout, and don't bother with any cables. Several train sounds are also included in the app to play sounds when locomotive functions are pressed. But you can not only play with your locomotives. Change turnouts, lights, any asseccory and even routes with only one touch. No need to remember addresses, just use names and pictures. Finally, you are able to play with several trains simultaneously, change turnouts, routes with a touch. Of course you can change all of your CVs. All of that from an easy-to-use straightforward application. DigiTrains is compatible with Roco Z21, JMRI and DigiWifi by Digitools and more coming soon. Google+: https://plus.google.com/109947556961183009200/posts Facebook: https://www.facebook.com/pages/DigiTrains-App/369091469914898? ref=hlDocumentation: https://drive. google.com/file/d/0By2pZ2n1CiqmYmF2MmRWTDJqX1E/view? usp=sharingEnglish blog: http://digitrains-app. blogspot. hu/Permissions: Camera/Photos: you can create photos of your locomotivesStorage: the photos are stored on the storageWiFi/Internet: the app controls your layout via WiFi or Mobile InternetWakelock: the app screen never sleeps during train controlInApp Products: if you like to play with the free basic functions you can purchase extra functionalities.