Discount Ninja Promo Engine

I installed the app and then tried to install companion app so that, along with the automatic discount, I could offer a discount at checkout. The app hides the discount field at checkout and a companion app needs to be installed in order to correct that. I attempted to download and install the companion app three or four times. Each time I was redirected to a url that didn't exist.

I emailed support and heard back only once. Their email instructed me to use a different email address. I sent three email addresses to that address (the original and two follow-up) and never heard back from them.

As a result of this, I lost sales. I had advertised a discount with free shipping and wasn't able to offer the free shipping due to not being able to install the companion app.

I am very disappointed with this app and it's developers. Their tech support is terrible, at best. I recommend using another app instead of this one.