I am withdrawing my pledge of 25 euro. 
It has gotten clear in a private chat with Jelger (private since I made example movies that would expose too much information imo) that I will not be able to use my gateway as a device (control it’s light, etc) the way I used to with MaxMudjon’s HCS app.
It is unable to retrieve a token for my gateway for some reason and without it, you cannot add it as a device. Adding the gateway in the app settings can be done by mac address and password too; no token needed there. But for adding the gateway as a device it does, which is a change compared to Maxmudjon’s HCS app.
Since Jelger wrote that adding the gateway as a device without having it’s token will not be possible, I unfortunately am moving away from this app.
