That's what's so good about Tails. You just boot it, and have a secure Debian system with Tor. But there are some vulnerabilities. Especially because the Tor daemon and userland are not isolated.
It one point, I experimented with packing VirtualBox, a pfSense VPN gateway, and Whonix, in a LiveDVD. It required 8GB RAM, and took minutes to boot. But once it was up, it was quite snappy, because it was all in RAM.
Anyway, it would be cool if someone could pack all of that in an app.