Kyatric "Also, on first execution, the key won't exist. So instead of attempting to "get" the key, you should first check if it exists.
If it doesn't, then you can assume this is the first execution, and you can create your key."
Tried that, Didn't work for me, so I tried with this. I actually got it to work now somehow on the iPhone. But it's black magic and beyond my understanding. Will read up more about this but I'm afraid it might be a CocoonJS incompatibility or something.