Its a scam/ Betrug/ dont get it

When you test it - all looks great - as soon as you buy a plan - I bought a 30 day plan - it works for one more day and then it stops.
Non of the servers neither the alternative connecting types work.
I have Iphone 6s, running IOS9.3.1
There is no way to get any customer service email or contact - at least not from China.
I suggest leave your fingers off.
The first added vpn profile pulled a weirdo address - and this can not be deleted from the phone anymore.
If you try to add vpn profiles for the different connecting types with the instruction provided under user manual in the app - then it still will not work.

enjoylife1 about VPN Express - Free Mobile VPN, v5.1.0