the android app was ztrader :
https://play.google.com/store/apps/details?id=co.bandicoot.ztrader

but it's really not convenient to trade on my phone. And you can't get a global overview.
What I'm looking for is something like magnr (magnr.com) but using api instead of paying extra fees for an external service.
maybe CAT could be an option but i find it really expensive.