If you want open Qlik sense URL in Outside environment like Android or browser anything you need to map your server IP with public IP.
Then You can get access outside also.
There are no Apps Released for Android and windows Phone. But you can access from Browser.You need to Map server IP With Public IP
If you Don't have Public IP You can access from VPN Connectivity with IP Address!!
Do not forget to open the ports > Ports ‒ Qlik Sense
The default ports are exposed to the Qlik Sense users and need to be open through any firewalls to each Qlik Sense Proxy Service (QPS) in the site.
Service Port Direction Purpose QPS 443 Inbound Inbound user web traffic when using HTTPS. QPS 4244 Inbound Authentication port when using Windows authentication over HTTPS. QPS 80 Inbound Inbound user web traffic when using HTTP (optional). QPS 4248 Inbound Authentication port when using Windows authentication over HTTP (optional).
You can access using browser since Qlik Sense already support HTML 5.
If you want to develop native mobile apps, you can create a webview that point to your Qlik Sense Server.