Ask HN: Customer support help desk with mobile app integration?

Hey, we work on several mobile games for iOS and Android. Right now, our players have to open Safari to send us support requests and create an additional account. That sucks and is totally unnecessary. We already identify the players to give them the same account from the server, so we could just use this. Of course we could build it ourselves, but the real problem of customer support software is another one - and we don't know anything about that. Is there a customer support help desk software/service that lets you integrate and authenticate in your app? Thanks.