By installing into our device they must ask and want to access to their app, and whatever that will make me to grant access to such app to help load my bet history is something I wouldn't want to permits.
I don't know how the backend is controlled if the dev who is in charge wouldn't think and planning to launch such evil one day then it could have been nice using that exchange but, they have already soiled their trust especially, now that people are seeing complaining they wouldn't mind running away from the exchange.