How do I know if my Nexux 5 has USB host support?

[tomorrowisalongtime]

Hello.

I want to download an app to control my DSLR camera, but the app description says I should make sure I have a USB OTG cable and my phone has USB host support. I have a NON-rooted Nexus 5 running Lollipop 5.0.1. I've been searching the web trying to figure out how to check if my phone has USB host support, but I haven't come across anything that can confirm or deny this.

I'm a complete noob, so any help or input would be greatly appreciated.

Thanks in advance.

PS.- This is the app I want to try out:
https://play.google.com/store/apps/details?id=com.dslr.dashboard&hl=es